Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 19 | #include <linux/fs.h> |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 20 | #include <linux/blkdev.h> |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 21 | #include <linux/scatterlist.h> |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 22 | #include <linux/swap.h> |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 23 | #include <linux/radix-tree.h> |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 24 | #include <linux/writeback.h> |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 25 | #include <linux/buffer_head.h> |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 26 | #include <linux/workqueue.h> |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 27 | #include <linux/kthread.h> |
Chris Mason | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 28 | #include <linux/freezer.h> |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 29 | #include <linux/crc32c.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 31 | #include <linux/migrate.h> |
Chris Mason | 4b4e25f | 2008-11-20 10:22:27 -0500 | [diff] [blame] | 32 | #include "compat.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 33 | #include "ctree.h" |
| 34 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 35 | #include "transaction.h" |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 36 | #include "btrfs_inode.h" |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 37 | #include "volumes.h" |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 38 | #include "print-tree.h" |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 39 | #include "async-thread.h" |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 40 | #include "locking.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 41 | #include "tree-log.h" |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 42 | #include "free-space-cache.h" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 43 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 44 | static struct extent_io_ops btree_extent_io_ops; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 45 | static void end_workqueue_fn(struct btrfs_work *work); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 46 | static void free_fs_root(struct btrfs_root *root); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 47 | static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
| 48 | int read_only); |
| 49 | static int btrfs_destroy_ordered_operations(struct btrfs_root *root); |
| 50 | static int btrfs_destroy_ordered_extents(struct btrfs_root *root); |
| 51 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 52 | struct btrfs_root *root); |
| 53 | static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t); |
| 54 | static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root); |
| 55 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 56 | struct extent_io_tree *dirty_pages, |
| 57 | int mark); |
| 58 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 59 | struct extent_io_tree *pinned_extents); |
| 60 | static int btrfs_cleanup_transaction(struct btrfs_root *root); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 61 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 62 | /* |
| 63 | * end_io_wq structs are used to do processing in task context when an IO is |
| 64 | * complete. This is used during reads to verify checksums, and it is used |
| 65 | * by writes to insert metadata for new file extents after IO is complete. |
| 66 | */ |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 67 | struct end_io_wq { |
| 68 | struct bio *bio; |
| 69 | bio_end_io_t *end_io; |
| 70 | void *private; |
| 71 | struct btrfs_fs_info *info; |
| 72 | int error; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 73 | int metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 74 | struct list_head list; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 75 | struct btrfs_work work; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 76 | }; |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 77 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 78 | /* |
| 79 | * async submit bios are used to offload expensive checksumming |
| 80 | * onto the worker threads. They checksum file and metadata bios |
| 81 | * just before they are sent down the IO stack. |
| 82 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 83 | struct async_submit_bio { |
| 84 | struct inode *inode; |
| 85 | struct bio *bio; |
| 86 | struct list_head list; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 87 | extent_submit_bio_hook_t *submit_bio_start; |
| 88 | extent_submit_bio_hook_t *submit_bio_done; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 89 | int rw; |
| 90 | int mirror_num; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 91 | unsigned long bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 92 | /* |
| 93 | * bio_offset is optional, can be used if the pages in the bio |
| 94 | * can't tell us where in the file the bio should go |
| 95 | */ |
| 96 | u64 bio_offset; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 97 | struct btrfs_work work; |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 98 | }; |
| 99 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 100 | /* These are used to set the lockdep class on the extent buffer locks. |
| 101 | * The class is set by the readpage_end_io_hook after the buffer has |
| 102 | * passed csum validation but before the pages are unlocked. |
| 103 | * |
| 104 | * The lockdep class is also set by btrfs_init_new_buffer on freshly |
| 105 | * allocated blocks. |
| 106 | * |
| 107 | * The class is based on the level in the tree block, which allows lockdep |
| 108 | * to know that lower nodes nest inside the locks of higher nodes. |
| 109 | * |
| 110 | * We also add a check to make sure the highest level of the tree is |
| 111 | * the same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this |
| 112 | * code needs update as well. |
| 113 | */ |
| 114 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 115 | # if BTRFS_MAX_LEVEL != 8 |
| 116 | # error |
| 117 | # endif |
| 118 | static struct lock_class_key btrfs_eb_class[BTRFS_MAX_LEVEL + 1]; |
| 119 | static const char *btrfs_eb_name[BTRFS_MAX_LEVEL + 1] = { |
| 120 | /* leaf */ |
| 121 | "btrfs-extent-00", |
| 122 | "btrfs-extent-01", |
| 123 | "btrfs-extent-02", |
| 124 | "btrfs-extent-03", |
| 125 | "btrfs-extent-04", |
| 126 | "btrfs-extent-05", |
| 127 | "btrfs-extent-06", |
| 128 | "btrfs-extent-07", |
| 129 | /* highest possible level */ |
| 130 | "btrfs-extent-08", |
| 131 | }; |
| 132 | #endif |
| 133 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 134 | /* |
| 135 | * extents on the btree inode are pretty simple, there's one extent |
| 136 | * that covers the entire device |
| 137 | */ |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 138 | static struct extent_map *btree_get_extent(struct inode *inode, |
| 139 | struct page *page, size_t page_offset, u64 start, u64 len, |
| 140 | int create) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 141 | { |
| 142 | struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; |
| 143 | struct extent_map *em; |
| 144 | int ret; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 145 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 146 | read_lock(&em_tree->lock); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 147 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 148 | if (em) { |
| 149 | em->bdev = |
| 150 | BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 151 | read_unlock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 152 | goto out; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 153 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 154 | read_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 155 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 156 | em = alloc_extent_map(GFP_NOFS); |
| 157 | if (!em) { |
| 158 | em = ERR_PTR(-ENOMEM); |
| 159 | goto out; |
| 160 | } |
| 161 | em->start = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 162 | em->len = (u64)-1; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 163 | em->block_len = (u64)-1; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 164 | em->block_start = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 165 | em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 166 | |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 167 | write_lock(&em_tree->lock); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 168 | ret = add_extent_mapping(em_tree, em); |
| 169 | if (ret == -EEXIST) { |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 170 | u64 failed_start = em->start; |
| 171 | u64 failed_len = em->len; |
| 172 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 173 | free_extent_map(em); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 174 | em = lookup_extent_mapping(em_tree, start, len); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 175 | if (em) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 176 | ret = 0; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 177 | } else { |
| 178 | em = lookup_extent_mapping(em_tree, failed_start, |
| 179 | failed_len); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 180 | ret = -EIO; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 181 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 182 | } else if (ret) { |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 183 | free_extent_map(em); |
| 184 | em = NULL; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 185 | } |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 186 | write_unlock(&em_tree->lock); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 187 | |
| 188 | if (ret) |
| 189 | em = ERR_PTR(ret); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 190 | out: |
| 191 | return em; |
| 192 | } |
| 193 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 194 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len) |
| 195 | { |
David Woodhouse | 163e783 | 2009-04-19 13:02:41 +0100 | [diff] [blame] | 196 | return crc32c(seed, data, len); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | void btrfs_csum_final(u32 crc, char *result) |
| 200 | { |
| 201 | *(__le32 *)result = ~cpu_to_le32(crc); |
| 202 | } |
| 203 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 204 | /* |
| 205 | * compute the csum for a btree block, and either verify it or write it |
| 206 | * into the csum field of the block. |
| 207 | */ |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 208 | static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| 209 | int verify) |
| 210 | { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 211 | u16 csum_size = |
| 212 | btrfs_super_csum_size(&root->fs_info->super_copy); |
| 213 | char *result = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 214 | unsigned long len; |
| 215 | unsigned long cur_len; |
| 216 | unsigned long offset = BTRFS_CSUM_SIZE; |
| 217 | char *map_token = NULL; |
| 218 | char *kaddr; |
| 219 | unsigned long map_start; |
| 220 | unsigned long map_len; |
| 221 | int err; |
| 222 | u32 crc = ~(u32)0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 223 | unsigned long inline_result; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 224 | |
| 225 | len = buf->len - offset; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 226 | while (len > 0) { |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 227 | err = map_private_extent_buffer(buf, offset, 32, |
| 228 | &map_token, &kaddr, |
| 229 | &map_start, &map_len, KM_USER0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 230 | if (err) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 231 | return 1; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 232 | cur_len = min(len, map_len - (offset - map_start)); |
| 233 | crc = btrfs_csum_data(root, kaddr + offset - map_start, |
| 234 | crc, cur_len); |
| 235 | len -= cur_len; |
| 236 | offset += cur_len; |
| 237 | unmap_extent_buffer(buf, map_token, KM_USER0); |
| 238 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 239 | if (csum_size > sizeof(inline_result)) { |
| 240 | result = kzalloc(csum_size * sizeof(char), GFP_NOFS); |
| 241 | if (!result) |
| 242 | return 1; |
| 243 | } else { |
| 244 | result = (char *)&inline_result; |
| 245 | } |
| 246 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 247 | btrfs_csum_final(crc, result); |
| 248 | |
| 249 | if (verify) { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 250 | if (memcmp_extent_buffer(buf, result, 0, csum_size)) { |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 251 | u32 val; |
| 252 | u32 found = 0; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 253 | memcpy(&found, result, csum_size); |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 254 | |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 255 | read_extent_buffer(buf, &val, 0, csum_size); |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 256 | if (printk_ratelimit()) { |
| 257 | printk(KERN_INFO "btrfs: %s checksum verify " |
| 258 | "failed on %llu wanted %X found %X " |
| 259 | "level %d\n", |
| 260 | root->fs_info->sb->s_id, |
| 261 | (unsigned long long)buf->start, val, found, |
| 262 | btrfs_header_level(buf)); |
| 263 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 264 | if (result != (char *)&inline_result) |
| 265 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 266 | return 1; |
| 267 | } |
| 268 | } else { |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 269 | write_extent_buffer(buf, result, 0, csum_size); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 270 | } |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 271 | if (result != (char *)&inline_result) |
| 272 | kfree(result); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 273 | return 0; |
| 274 | } |
| 275 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 276 | /* |
| 277 | * we can't consider a given block up to date unless the transid of the |
| 278 | * block matches the transid in the parent node's pointer. This is how we |
| 279 | * detect blocks that either didn't get written at all or got written |
| 280 | * in the wrong place. |
| 281 | */ |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 282 | static int verify_parent_transid(struct extent_io_tree *io_tree, |
| 283 | struct extent_buffer *eb, u64 parent_transid) |
| 284 | { |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 285 | struct extent_state *cached_state = NULL; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 286 | int ret; |
| 287 | |
| 288 | if (!parent_transid || btrfs_header_generation(eb) == parent_transid) |
| 289 | return 0; |
| 290 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 291 | lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1, |
| 292 | 0, &cached_state, GFP_NOFS); |
| 293 | if (extent_buffer_uptodate(io_tree, eb, cached_state) && |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 294 | btrfs_header_generation(eb) == parent_transid) { |
| 295 | ret = 0; |
| 296 | goto out; |
| 297 | } |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 298 | if (printk_ratelimit()) { |
| 299 | printk("parent transid verify failed on %llu wanted %llu " |
| 300 | "found %llu\n", |
| 301 | (unsigned long long)eb->start, |
| 302 | (unsigned long long)parent_transid, |
| 303 | (unsigned long long)btrfs_header_generation(eb)); |
| 304 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 305 | ret = 1; |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 306 | clear_extent_buffer_uptodate(io_tree, eb, &cached_state); |
Chris Mason | 33958dc | 2008-07-30 10:29:12 -0400 | [diff] [blame] | 307 | out: |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 308 | unlock_extent_cached(io_tree, eb->start, eb->start + eb->len - 1, |
| 309 | &cached_state, GFP_NOFS); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 310 | return ret; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 313 | /* |
| 314 | * helper to read a given tree block, doing retries as required when |
| 315 | * the checksums don't match and we have alternate mirrors to try. |
| 316 | */ |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 317 | static int btree_read_extent_buffer_pages(struct btrfs_root *root, |
| 318 | struct extent_buffer *eb, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 319 | u64 start, u64 parent_transid) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 320 | { |
| 321 | struct extent_io_tree *io_tree; |
| 322 | int ret; |
| 323 | int num_copies = 0; |
| 324 | int mirror_num = 0; |
| 325 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame^] | 326 | clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 327 | io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree; |
| 328 | while (1) { |
| 329 | ret = read_extent_buffer_pages(io_tree, eb, start, 1, |
| 330 | btree_get_extent, mirror_num); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 331 | if (!ret && |
| 332 | !verify_parent_transid(io_tree, eb, parent_transid)) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 333 | return ret; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 334 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame^] | 335 | /* |
| 336 | * This buffer's crc is fine, but its contents are corrupted, so |
| 337 | * there is no reason to read the other copies, they won't be |
| 338 | * any less wrong. |
| 339 | */ |
| 340 | if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) |
| 341 | return ret; |
| 342 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 343 | num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, |
| 344 | eb->start, eb->len); |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 345 | if (num_copies == 1) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 346 | return ret; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 347 | |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 348 | mirror_num++; |
Chris Mason | 4235298 | 2008-04-28 16:40:52 -0400 | [diff] [blame] | 349 | if (mirror_num > num_copies) |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 350 | return ret; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 351 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 352 | return -EIO; |
| 353 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 354 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 355 | /* |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 356 | * checksum a dirty tree block before IO. This has extra checks to make sure |
| 357 | * we only fill in the checksum field in the first page of a multi-page block |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 358 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 359 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 360 | static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 361 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 362 | struct extent_io_tree *tree; |
Chris Mason | 35ebb93 | 2007-10-30 16:56:53 -0400 | [diff] [blame] | 363 | u64 start = (u64)page->index << PAGE_CACHE_SHIFT; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 364 | u64 found_start; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 365 | unsigned long len; |
| 366 | struct extent_buffer *eb; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 367 | int ret; |
| 368 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 369 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 370 | |
Chris Mason | eb14ab8 | 2011-02-10 12:35:00 -0500 | [diff] [blame] | 371 | if (page->private == EXTENT_PAGE_PRIVATE) { |
| 372 | WARN_ON(1); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 373 | goto out; |
Chris Mason | eb14ab8 | 2011-02-10 12:35:00 -0500 | [diff] [blame] | 374 | } |
| 375 | if (!page->private) { |
| 376 | WARN_ON(1); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 377 | goto out; |
Chris Mason | eb14ab8 | 2011-02-10 12:35:00 -0500 | [diff] [blame] | 378 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 379 | len = page->private >> 2; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 380 | WARN_ON(len == 0); |
| 381 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 382 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Tsutomu Itoh | 91ca338 | 2011-01-05 02:32:22 +0000 | [diff] [blame] | 383 | if (eb == NULL) { |
| 384 | WARN_ON(1); |
| 385 | goto out; |
| 386 | } |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 387 | ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, |
| 388 | btrfs_header_generation(eb)); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 389 | BUG_ON(ret); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 390 | WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)); |
| 391 | |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 392 | found_start = btrfs_header_bytenr(eb); |
| 393 | if (found_start != start) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 394 | WARN_ON(1); |
| 395 | goto err; |
| 396 | } |
| 397 | if (eb->first_page != page) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 398 | WARN_ON(1); |
| 399 | goto err; |
| 400 | } |
| 401 | if (!PageUptodate(page)) { |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 402 | WARN_ON(1); |
| 403 | goto err; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 404 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 405 | csum_tree_block(root, eb, 0); |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 406 | err: |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 407 | free_extent_buffer(eb); |
| 408 | out: |
| 409 | return 0; |
| 410 | } |
| 411 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 412 | static int check_tree_block_fsid(struct btrfs_root *root, |
| 413 | struct extent_buffer *eb) |
| 414 | { |
| 415 | struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices; |
| 416 | u8 fsid[BTRFS_UUID_SIZE]; |
| 417 | int ret = 1; |
| 418 | |
| 419 | read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb), |
| 420 | BTRFS_FSID_SIZE); |
| 421 | while (fs_devices) { |
| 422 | if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) { |
| 423 | ret = 0; |
| 424 | break; |
| 425 | } |
| 426 | fs_devices = fs_devices->seed; |
| 427 | } |
| 428 | return ret; |
| 429 | } |
| 430 | |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame^] | 431 | #define CORRUPT(reason, eb, root, slot) \ |
| 432 | printk(KERN_CRIT "btrfs: corrupt leaf, %s: block=%llu," \ |
| 433 | "root=%llu, slot=%d\n", reason, \ |
| 434 | (unsigned long long)btrfs_header_bytenr(eb), \ |
| 435 | (unsigned long long)root->objectid, slot) |
| 436 | |
| 437 | static noinline int check_leaf(struct btrfs_root *root, |
| 438 | struct extent_buffer *leaf) |
| 439 | { |
| 440 | struct btrfs_key key; |
| 441 | struct btrfs_key leaf_key; |
| 442 | u32 nritems = btrfs_header_nritems(leaf); |
| 443 | int slot; |
| 444 | |
| 445 | if (nritems == 0) |
| 446 | return 0; |
| 447 | |
| 448 | /* Check the 0 item */ |
| 449 | if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) != |
| 450 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 451 | CORRUPT("invalid item offset size pair", leaf, root, 0); |
| 452 | return -EIO; |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * Check to make sure each items keys are in the correct order and their |
| 457 | * offsets make sense. We only have to loop through nritems-1 because |
| 458 | * we check the current slot against the next slot, which verifies the |
| 459 | * next slot's offset+size makes sense and that the current's slot |
| 460 | * offset is correct. |
| 461 | */ |
| 462 | for (slot = 0; slot < nritems - 1; slot++) { |
| 463 | btrfs_item_key_to_cpu(leaf, &leaf_key, slot); |
| 464 | btrfs_item_key_to_cpu(leaf, &key, slot + 1); |
| 465 | |
| 466 | /* Make sure the keys are in the right order */ |
| 467 | if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) { |
| 468 | CORRUPT("bad key order", leaf, root, slot); |
| 469 | return -EIO; |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * Make sure the offset and ends are right, remember that the |
| 474 | * item data starts at the end of the leaf and grows towards the |
| 475 | * front. |
| 476 | */ |
| 477 | if (btrfs_item_offset_nr(leaf, slot) != |
| 478 | btrfs_item_end_nr(leaf, slot + 1)) { |
| 479 | CORRUPT("slot offset bad", leaf, root, slot); |
| 480 | return -EIO; |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Check to make sure that we don't point outside of the leaf, |
| 485 | * just incase all the items are consistent to eachother, but |
| 486 | * all point outside of the leaf. |
| 487 | */ |
| 488 | if (btrfs_item_end_nr(leaf, slot) > |
| 489 | BTRFS_LEAF_DATA_SIZE(root)) { |
| 490 | CORRUPT("slot end outside of leaf", leaf, root, slot); |
| 491 | return -EIO; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 498 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 499 | void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level) |
| 500 | { |
| 501 | lockdep_set_class_and_name(&eb->lock, |
| 502 | &btrfs_eb_class[level], |
| 503 | btrfs_eb_name[level]); |
| 504 | } |
| 505 | #endif |
| 506 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 507 | static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 508 | struct extent_state *state) |
| 509 | { |
| 510 | struct extent_io_tree *tree; |
| 511 | u64 found_start; |
| 512 | int found_level; |
| 513 | unsigned long len; |
| 514 | struct extent_buffer *eb; |
| 515 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 516 | int ret = 0; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 517 | |
| 518 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 519 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 520 | goto out; |
| 521 | if (!page->private) |
| 522 | goto out; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 523 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 524 | len = page->private >> 2; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 525 | WARN_ON(len == 0); |
| 526 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 527 | eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); |
Tsutomu Itoh | 91ca338 | 2011-01-05 02:32:22 +0000 | [diff] [blame] | 528 | if (eb == NULL) { |
| 529 | ret = -EIO; |
| 530 | goto out; |
| 531 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 532 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 533 | found_start = btrfs_header_bytenr(eb); |
Chris Mason | 23a0786 | 2008-09-12 08:57:47 -0400 | [diff] [blame] | 534 | if (found_start != start) { |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 535 | if (printk_ratelimit()) { |
| 536 | printk(KERN_INFO "btrfs bad tree block start " |
| 537 | "%llu %llu\n", |
| 538 | (unsigned long long)found_start, |
| 539 | (unsigned long long)eb->start); |
| 540 | } |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 541 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 542 | goto err; |
| 543 | } |
| 544 | if (eb->first_page != page) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 545 | printk(KERN_INFO "btrfs bad first page %lu %lu\n", |
| 546 | eb->first_page->index, page->index); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 547 | WARN_ON(1); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 548 | ret = -EIO; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 549 | goto err; |
| 550 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 551 | if (check_tree_block_fsid(root, eb)) { |
Chris Mason | 193f284 | 2009-04-27 07:29:05 -0400 | [diff] [blame] | 552 | if (printk_ratelimit()) { |
| 553 | printk(KERN_INFO "btrfs bad fsid on block %llu\n", |
| 554 | (unsigned long long)eb->start); |
| 555 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 556 | ret = -EIO; |
| 557 | goto err; |
| 558 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 559 | found_level = btrfs_header_level(eb); |
| 560 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 561 | btrfs_set_buffer_lockdep_class(eb, found_level); |
| 562 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 563 | ret = csum_tree_block(root, eb, 1); |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame^] | 564 | if (ret) { |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 565 | ret = -EIO; |
Josef Bacik | a826d6d | 2011-03-16 13:42:43 -0400 | [diff] [blame^] | 566 | goto err; |
| 567 | } |
| 568 | |
| 569 | /* |
| 570 | * If this is a leaf block and it is corrupt, set the corrupt bit so |
| 571 | * that we don't try and read the other copies of this block, just |
| 572 | * return -EIO. |
| 573 | */ |
| 574 | if (found_level == 0 && check_leaf(root, eb)) { |
| 575 | set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags); |
| 576 | ret = -EIO; |
| 577 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 578 | |
| 579 | end = min_t(u64, eb->len, PAGE_CACHE_SIZE); |
| 580 | end = eb->start + end - 1; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 581 | err: |
| 582 | free_extent_buffer(eb); |
| 583 | out: |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 584 | return ret; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 585 | } |
| 586 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 587 | static void end_workqueue_bio(struct bio *bio, int err) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 588 | { |
| 589 | struct end_io_wq *end_io_wq = bio->bi_private; |
| 590 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 591 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 592 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 593 | end_io_wq->error = err; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 594 | end_io_wq->work.func = end_workqueue_fn; |
| 595 | end_io_wq->work.flags = 0; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 596 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 597 | if (bio->bi_rw & REQ_WRITE) { |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 598 | if (end_io_wq->metadata == 1) |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 599 | btrfs_queue_worker(&fs_info->endio_meta_write_workers, |
| 600 | &end_io_wq->work); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 601 | else if (end_io_wq->metadata == 2) |
| 602 | btrfs_queue_worker(&fs_info->endio_freespace_worker, |
| 603 | &end_io_wq->work); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 604 | else |
| 605 | btrfs_queue_worker(&fs_info->endio_write_workers, |
| 606 | &end_io_wq->work); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 607 | } else { |
| 608 | if (end_io_wq->metadata) |
| 609 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
| 610 | &end_io_wq->work); |
| 611 | else |
| 612 | btrfs_queue_worker(&fs_info->endio_workers, |
| 613 | &end_io_wq->work); |
| 614 | } |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 615 | } |
| 616 | |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 617 | /* |
| 618 | * For the metadata arg you want |
| 619 | * |
| 620 | * 0 - if data |
| 621 | * 1 - if normal metadta |
| 622 | * 2 - if writing to the free space cache area |
| 623 | */ |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 624 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
| 625 | int metadata) |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 626 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 627 | struct end_io_wq *end_io_wq; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 628 | end_io_wq = kmalloc(sizeof(*end_io_wq), GFP_NOFS); |
| 629 | if (!end_io_wq) |
| 630 | return -ENOMEM; |
| 631 | |
| 632 | end_io_wq->private = bio->bi_private; |
| 633 | end_io_wq->end_io = bio->bi_end_io; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 634 | end_io_wq->info = info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 635 | end_io_wq->error = 0; |
| 636 | end_io_wq->bio = bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 637 | end_io_wq->metadata = metadata; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 638 | |
| 639 | bio->bi_private = end_io_wq; |
| 640 | bio->bi_end_io = end_workqueue_bio; |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 641 | return 0; |
| 642 | } |
| 643 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 644 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 645 | { |
| 646 | unsigned long limit = min_t(unsigned long, |
| 647 | info->workers.max_workers, |
| 648 | info->fs_devices->open_devices); |
| 649 | return 256 * limit; |
| 650 | } |
| 651 | |
Chris Mason | 777e6bd | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 652 | int btrfs_congested_async(struct btrfs_fs_info *info, int iodone) |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 653 | { |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 654 | return atomic_read(&info->nr_async_bios) > |
| 655 | btrfs_async_submit_limit(info); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 656 | } |
| 657 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 658 | static void run_one_async_start(struct btrfs_work *work) |
| 659 | { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 660 | struct async_submit_bio *async; |
| 661 | |
| 662 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 663 | async->submit_bio_start(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 664 | async->mirror_num, async->bio_flags, |
| 665 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 666 | } |
| 667 | |
| 668 | static void run_one_async_done(struct btrfs_work *work) |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 669 | { |
| 670 | struct btrfs_fs_info *fs_info; |
| 671 | struct async_submit_bio *async; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 672 | int limit; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 673 | |
| 674 | async = container_of(work, struct async_submit_bio, work); |
| 675 | fs_info = BTRFS_I(async->inode)->root->fs_info; |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 676 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 677 | limit = btrfs_async_submit_limit(fs_info); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 678 | limit = limit * 2 / 3; |
| 679 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 680 | atomic_dec(&fs_info->nr_async_submits); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 681 | |
Chris Mason | b64a285 | 2008-08-20 13:39:41 -0400 | [diff] [blame] | 682 | if (atomic_read(&fs_info->nr_async_submits) < limit && |
| 683 | waitqueue_active(&fs_info->async_submit_wait)) |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 684 | wake_up(&fs_info->async_submit_wait); |
| 685 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 686 | async->submit_bio_done(async->inode, async->rw, async->bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 687 | async->mirror_num, async->bio_flags, |
| 688 | async->bio_offset); |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | static void run_one_async_free(struct btrfs_work *work) |
| 692 | { |
| 693 | struct async_submit_bio *async; |
| 694 | |
| 695 | async = container_of(work, struct async_submit_bio, work); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 696 | kfree(async); |
| 697 | } |
| 698 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 699 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, |
| 700 | int rw, struct bio *bio, int mirror_num, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 701 | unsigned long bio_flags, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 702 | u64 bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 703 | extent_submit_bio_hook_t *submit_bio_start, |
| 704 | extent_submit_bio_hook_t *submit_bio_done) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 705 | { |
| 706 | struct async_submit_bio *async; |
| 707 | |
| 708 | async = kmalloc(sizeof(*async), GFP_NOFS); |
| 709 | if (!async) |
| 710 | return -ENOMEM; |
| 711 | |
| 712 | async->inode = inode; |
| 713 | async->rw = rw; |
| 714 | async->bio = bio; |
| 715 | async->mirror_num = mirror_num; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 716 | async->submit_bio_start = submit_bio_start; |
| 717 | async->submit_bio_done = submit_bio_done; |
| 718 | |
| 719 | async->work.func = run_one_async_start; |
| 720 | async->work.ordered_func = run_one_async_done; |
| 721 | async->work.ordered_free = run_one_async_free; |
| 722 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 723 | async->work.flags = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 724 | async->bio_flags = bio_flags; |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 725 | async->bio_offset = bio_offset; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 726 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 727 | atomic_inc(&fs_info->nr_async_submits); |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 728 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 729 | if (rw & REQ_SYNC) |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 730 | btrfs_set_work_high_prio(&async->work); |
| 731 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 732 | btrfs_queue_worker(&fs_info->workers, &async->work); |
Chris Mason | 9473f16 | 2008-08-28 06:15:24 -0400 | [diff] [blame] | 733 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 734 | while (atomic_read(&fs_info->async_submit_draining) && |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 735 | atomic_read(&fs_info->nr_async_submits)) { |
| 736 | wait_event(fs_info->async_submit_wait, |
| 737 | (atomic_read(&fs_info->nr_async_submits) == 0)); |
| 738 | } |
| 739 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 740 | return 0; |
| 741 | } |
| 742 | |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 743 | static int btree_csum_one_bio(struct bio *bio) |
| 744 | { |
| 745 | struct bio_vec *bvec = bio->bi_io_vec; |
| 746 | int bio_index = 0; |
| 747 | struct btrfs_root *root; |
| 748 | |
| 749 | WARN_ON(bio->bi_vcnt <= 0); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 750 | while (bio_index < bio->bi_vcnt) { |
Chris Mason | ce3ed71 | 2008-09-23 13:14:12 -0400 | [diff] [blame] | 751 | root = BTRFS_I(bvec->bv_page->mapping->host)->root; |
| 752 | csum_dirty_buffer(root, bvec->bv_page); |
| 753 | bio_index++; |
| 754 | bvec++; |
| 755 | } |
| 756 | return 0; |
| 757 | } |
| 758 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 759 | static int __btree_submit_bio_start(struct inode *inode, int rw, |
| 760 | struct bio *bio, int mirror_num, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 761 | unsigned long bio_flags, |
| 762 | u64 bio_offset) |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 763 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 764 | /* |
| 765 | * when we're called for a write, we're already in the async |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 766 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 767 | */ |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 768 | btree_csum_one_bio(bio); |
| 769 | return 0; |
| 770 | } |
Chris Mason | 22c5994 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 771 | |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 772 | static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 773 | int mirror_num, unsigned long bio_flags, |
| 774 | u64 bio_offset) |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 775 | { |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 776 | /* |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 777 | * when we're called for a write, we're already in the async |
| 778 | * submission context. Just jump into btrfs_map_bio |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 779 | */ |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 780 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 781 | } |
| 782 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 783 | static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 784 | int mirror_num, unsigned long bio_flags, |
| 785 | u64 bio_offset) |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 786 | { |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 787 | int ret; |
| 788 | |
| 789 | ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, |
| 790 | bio, 1); |
| 791 | BUG_ON(ret); |
| 792 | |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 793 | if (!(rw & REQ_WRITE)) { |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 794 | /* |
| 795 | * called for a read, do the setup so that checksum validation |
| 796 | * can happen in the async kernel threads |
| 797 | */ |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 798 | return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, |
Chris Mason | 6f3577b | 2008-11-13 09:59:36 -0500 | [diff] [blame] | 799 | mirror_num, 0); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 800 | } |
Chris Mason | d313d7a | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 801 | |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 802 | /* |
| 803 | * kthread helpers are used to submit writes so that checksumming |
| 804 | * can happen in parallel across all CPUs |
| 805 | */ |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 806 | return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 807 | inode, rw, bio, mirror_num, 0, |
Chris Mason | eaf25d9 | 2010-05-25 09:48:28 -0400 | [diff] [blame] | 808 | bio_offset, |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 809 | __btree_submit_bio_start, |
| 810 | __btree_submit_bio_done); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 811 | } |
| 812 | |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 813 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 814 | static int btree_migratepage(struct address_space *mapping, |
| 815 | struct page *newpage, struct page *page) |
| 816 | { |
| 817 | /* |
| 818 | * we can't safely write a btree page from here, |
| 819 | * we haven't done the locking hook |
| 820 | */ |
| 821 | if (PageDirty(page)) |
| 822 | return -EAGAIN; |
| 823 | /* |
| 824 | * Buffers may be managed in a filesystem specific way. |
| 825 | * We must have no buffers or drop them. |
| 826 | */ |
| 827 | if (page_has_private(page) && |
| 828 | !try_to_release_page(page, GFP_KERNEL)) |
| 829 | return -EAGAIN; |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 830 | return migrate_page(mapping, newpage, page); |
| 831 | } |
Jan Beulich | 3dd1462 | 2010-12-07 14:54:09 +0000 | [diff] [blame] | 832 | #endif |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 833 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 834 | static int btree_writepage(struct page *page, struct writeback_control *wbc) |
| 835 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 836 | struct extent_io_tree *tree; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 837 | struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; |
| 838 | struct extent_buffer *eb; |
| 839 | int was_dirty; |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 840 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 841 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 842 | if (!(current->flags & PF_MEMALLOC)) { |
| 843 | return extent_write_full_page(tree, page, |
| 844 | btree_get_extent, wbc); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 845 | } |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 846 | |
| 847 | redirty_page_for_writepage(wbc, page); |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 848 | eb = btrfs_find_tree_block(root, page_offset(page), PAGE_CACHE_SIZE); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 849 | WARN_ON(!eb); |
| 850 | |
| 851 | was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); |
| 852 | if (!was_dirty) { |
| 853 | spin_lock(&root->fs_info->delalloc_lock); |
| 854 | root->fs_info->dirty_metadata_bytes += PAGE_CACHE_SIZE; |
| 855 | spin_unlock(&root->fs_info->delalloc_lock); |
| 856 | } |
| 857 | free_extent_buffer(eb); |
| 858 | |
| 859 | unlock_page(page); |
| 860 | return 0; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 861 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 862 | |
| 863 | static int btree_writepages(struct address_space *mapping, |
| 864 | struct writeback_control *wbc) |
| 865 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 866 | struct extent_io_tree *tree; |
| 867 | tree = &BTRFS_I(mapping->host)->io_tree; |
Chris Mason | d8d5f3e | 2007-12-11 12:42:00 -0500 | [diff] [blame] | 868 | if (wbc->sync_mode == WB_SYNC_NONE) { |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 869 | struct btrfs_root *root = BTRFS_I(mapping->host)->root; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 870 | u64 num_dirty; |
Chris Mason | 24ab9cd | 2008-09-24 14:51:30 -0400 | [diff] [blame] | 871 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | 448d640 | 2007-11-27 07:52:01 -0800 | [diff] [blame] | 872 | |
| 873 | if (wbc->for_kupdate) |
| 874 | return 0; |
| 875 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 876 | /* this is a bit racy, but that's ok */ |
| 877 | num_dirty = root->fs_info->dirty_metadata_bytes; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 878 | if (num_dirty < thresh) |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 879 | return 0; |
Chris Mason | 793955b | 2007-11-26 16:34:41 -0800 | [diff] [blame] | 880 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 881 | return extent_writepages(tree, mapping, btree_get_extent, wbc); |
| 882 | } |
| 883 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 884 | static int btree_readpage(struct file *file, struct page *page) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 885 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 886 | struct extent_io_tree *tree; |
| 887 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 888 | return extent_read_full_page(tree, page, btree_get_extent); |
| 889 | } |
| 890 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 891 | static int btree_releasepage(struct page *page, gfp_t gfp_flags) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 892 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 893 | struct extent_io_tree *tree; |
| 894 | struct extent_map_tree *map; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 895 | int ret; |
| 896 | |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 897 | if (PageWriteback(page) || PageDirty(page)) |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 898 | return 0; |
Chris Mason | 98509cf | 2008-09-11 15:51:43 -0400 | [diff] [blame] | 899 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 900 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
| 901 | map = &BTRFS_I(page->mapping->host)->extent_tree; |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 902 | |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 903 | ret = try_release_extent_state(map, tree, page, gfp_flags); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 904 | if (!ret) |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 905 | return 0; |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 906 | |
| 907 | ret = try_release_extent_buffer(tree, page); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 908 | if (ret == 1) { |
| 909 | ClearPagePrivate(page); |
| 910 | set_page_private(page, 0); |
| 911 | page_cache_release(page); |
| 912 | } |
Chris Mason | 6af118ce | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 913 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 914 | return ret; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 915 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 916 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 917 | static void btree_invalidatepage(struct page *page, unsigned long offset) |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 918 | { |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 919 | struct extent_io_tree *tree; |
| 920 | tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 921 | extent_invalidatepage(tree, page, offset); |
| 922 | btree_releasepage(page, GFP_NOFS); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 923 | if (PagePrivate(page)) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 924 | printk(KERN_WARNING "btrfs warning page private not zero " |
| 925 | "on page %llu\n", (unsigned long long)page_offset(page)); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 926 | ClearPagePrivate(page); |
| 927 | set_page_private(page, 0); |
| 928 | page_cache_release(page); |
| 929 | } |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 930 | } |
| 931 | |
Alexey Dobriyan | 7f09410 | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 932 | static const struct address_space_operations btree_aops = { |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 933 | .readpage = btree_readpage, |
| 934 | .writepage = btree_writepage, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 935 | .writepages = btree_writepages, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 936 | .releasepage = btree_releasepage, |
| 937 | .invalidatepage = btree_invalidatepage, |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 938 | .sync_page = block_sync_page, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 939 | #ifdef CONFIG_MIGRATION |
Chris Mason | 784b4e2 | 2010-11-21 22:20:49 -0500 | [diff] [blame] | 940 | .migratepage = btree_migratepage, |
Chris Mason | 5a92bc8 | 2010-11-29 09:49:11 -0500 | [diff] [blame] | 941 | #endif |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 942 | }; |
| 943 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 944 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, |
| 945 | u64 parent_transid) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 946 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 947 | struct extent_buffer *buf = NULL; |
| 948 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 949 | int ret = 0; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 950 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 951 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 952 | if (!buf) |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 953 | return 0; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 954 | read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 955 | buf, 0, 0, btree_get_extent, 0); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 956 | free_extent_buffer(buf); |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 957 | return ret; |
Chris Mason | 090d187 | 2007-05-01 08:53:32 -0400 | [diff] [blame] | 958 | } |
| 959 | |
Chris Mason | 0999df5 | 2008-04-01 13:48:14 -0400 | [diff] [blame] | 960 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, |
| 961 | u64 bytenr, u32 blocksize) |
| 962 | { |
| 963 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 964 | struct extent_buffer *eb; |
| 965 | eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 966 | bytenr, blocksize, GFP_NOFS); |
| 967 | return eb; |
| 968 | } |
| 969 | |
| 970 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, |
| 971 | u64 bytenr, u32 blocksize) |
| 972 | { |
| 973 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 974 | struct extent_buffer *eb; |
| 975 | |
| 976 | eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, |
| 977 | bytenr, blocksize, NULL, GFP_NOFS); |
| 978 | return eb; |
| 979 | } |
| 980 | |
| 981 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 982 | int btrfs_write_tree_block(struct extent_buffer *buf) |
| 983 | { |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 984 | return filemap_fdatawrite_range(buf->first_page->mapping, buf->start, |
| 985 | buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf) |
| 989 | { |
Christoph Hellwig | 8aa38c3 | 2009-10-01 12:58:30 -0400 | [diff] [blame] | 990 | return filemap_fdatawait_range(buf->first_page->mapping, |
| 991 | buf->start, buf->start + buf->len - 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 992 | } |
| 993 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 994 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 995 | u32 blocksize, u64 parent_transid) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 996 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 997 | struct extent_buffer *buf = NULL; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 998 | int ret; |
| 999 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1000 | buf = btrfs_find_create_tree_block(root, bytenr, blocksize); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1001 | if (!buf) |
| 1002 | return NULL; |
Chris Mason | e4204de | 2008-01-08 15:46:27 -0500 | [diff] [blame] | 1003 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 1004 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1005 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1006 | if (ret == 0) |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1007 | set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1008 | return buf; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1009 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1010 | } |
| 1011 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1012 | int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1013 | struct extent_buffer *buf) |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 1014 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1015 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1016 | if (btrfs_header_generation(buf) == |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1017 | root->fs_info->running_transaction->transid) { |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 1018 | btrfs_assert_tree_locked(buf); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1019 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1020 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) { |
| 1021 | spin_lock(&root->fs_info->delalloc_lock); |
| 1022 | if (root->fs_info->dirty_metadata_bytes >= buf->len) |
| 1023 | root->fs_info->dirty_metadata_bytes -= buf->len; |
| 1024 | else |
| 1025 | WARN_ON(1); |
| 1026 | spin_unlock(&root->fs_info->delalloc_lock); |
| 1027 | } |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 1028 | |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1029 | /* ugh, clear_extent_buffer_dirty needs to lock the page */ |
| 1030 | btrfs_set_lock_blocking(buf); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1031 | clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 55c6907 | 2008-01-09 15:55:33 -0500 | [diff] [blame] | 1032 | buf); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1033 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1034 | return 0; |
| 1035 | } |
| 1036 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1037 | static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1038 | u32 stripesize, struct btrfs_root *root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1039 | struct btrfs_fs_info *fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1040 | u64 objectid) |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1041 | { |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 1042 | root->node = NULL; |
Chris Mason | a28ec19 | 2007-03-06 20:08:01 -0500 | [diff] [blame] | 1043 | root->commit_root = NULL; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1044 | root->sectorsize = sectorsize; |
| 1045 | root->nodesize = nodesize; |
| 1046 | root->leafsize = leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1047 | root->stripesize = stripesize; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1048 | root->ref_cows = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1049 | root->track_dirty = 0; |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1050 | root->in_radix = 0; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1051 | root->orphan_item_inserted = 0; |
| 1052 | root->orphan_cleanup_state = 0; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1053 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1054 | root->fs_info = fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1055 | root->objectid = objectid; |
| 1056 | root->last_trans = 0; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1057 | root->highest_objectid = 0; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1058 | root->name = NULL; |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 1059 | root->in_sysfs = 0; |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1060 | root->inode_tree = RB_ROOT; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1061 | root->block_rsv = NULL; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1062 | root->orphan_block_rsv = NULL; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1063 | |
| 1064 | INIT_LIST_HEAD(&root->dirty_list); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 1065 | INIT_LIST_HEAD(&root->orphan_list); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1066 | INIT_LIST_HEAD(&root->root_list); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1067 | spin_lock_init(&root->node_lock); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1068 | spin_lock_init(&root->orphan_lock); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1069 | spin_lock_init(&root->inode_lock); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1070 | spin_lock_init(&root->accounting_lock); |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1071 | mutex_init(&root->objectid_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1072 | mutex_init(&root->log_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1073 | init_waitqueue_head(&root->log_writer_wait); |
| 1074 | init_waitqueue_head(&root->log_commit_wait[0]); |
| 1075 | init_waitqueue_head(&root->log_commit_wait[1]); |
| 1076 | atomic_set(&root->log_commit[0], 0); |
| 1077 | atomic_set(&root->log_commit[1], 0); |
| 1078 | atomic_set(&root->log_writers, 0); |
| 1079 | root->log_batch = 0; |
| 1080 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1081 | root->last_log_commit = 0; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 1082 | extent_io_tree_init(&root->dirty_log_pages, |
| 1083 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Chris Mason | 017e536 | 2008-07-28 15:32:51 -0400 | [diff] [blame] | 1084 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1085 | memset(&root->root_key, 0, sizeof(root->root_key)); |
| 1086 | memset(&root->root_item, 0, sizeof(root->root_item)); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1087 | memset(&root->defrag_progress, 0, sizeof(root->defrag_progress)); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1088 | memset(&root->root_kobj, 0, sizeof(root->root_kobj)); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1089 | root->defrag_trans_start = fs_info->generation; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1090 | init_completion(&root->kobj_unregister); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1091 | root->defrag_running = 0; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1092 | root->root_key.objectid = objectid; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1093 | root->anon_super.s_root = NULL; |
| 1094 | root->anon_super.s_dev = 0; |
| 1095 | INIT_LIST_HEAD(&root->anon_super.s_list); |
| 1096 | INIT_LIST_HEAD(&root->anon_super.s_instances); |
| 1097 | init_rwsem(&root->anon_super.s_umount); |
| 1098 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1099 | return 0; |
| 1100 | } |
| 1101 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1102 | static int find_and_setup_root(struct btrfs_root *tree_root, |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1103 | struct btrfs_fs_info *fs_info, |
| 1104 | u64 objectid, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1105 | struct btrfs_root *root) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1106 | { |
| 1107 | int ret; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1108 | u32 blocksize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1109 | u64 generation; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1110 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1111 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1112 | tree_root->sectorsize, tree_root->stripesize, |
| 1113 | root, fs_info, objectid); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1114 | ret = btrfs_find_last_root(tree_root, objectid, |
| 1115 | &root->root_item, &root->root_key); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1116 | if (ret > 0) |
| 1117 | return -ENOENT; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1118 | BUG_ON(ret); |
| 1119 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1120 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1121 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 1122 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1123 | blocksize, generation); |
Chris Mason | 68433b7 | 2010-12-13 14:47:58 -0500 | [diff] [blame] | 1124 | if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) { |
| 1125 | free_extent_buffer(root->node); |
| 1126 | return -EIO; |
| 1127 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1128 | root->commit_root = btrfs_root_node(root); |
Chris Mason | d97e63b | 2007-02-20 16:40:44 -0500 | [diff] [blame] | 1129 | return 0; |
| 1130 | } |
| 1131 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1132 | static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, |
| 1133 | struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1134 | { |
| 1135 | struct btrfs_root *root; |
| 1136 | struct btrfs_root *tree_root = fs_info->tree_root; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1137 | struct extent_buffer *leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1138 | |
| 1139 | root = kzalloc(sizeof(*root), GFP_NOFS); |
| 1140 | if (!root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1141 | return ERR_PTR(-ENOMEM); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1142 | |
| 1143 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
| 1144 | tree_root->sectorsize, tree_root->stripesize, |
| 1145 | root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 1146 | |
| 1147 | root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 1148 | root->root_key.type = BTRFS_ROOT_ITEM_KEY; |
| 1149 | root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1150 | /* |
| 1151 | * log trees do not get reference counted because they go away |
| 1152 | * before a real commit is actually done. They do store pointers |
| 1153 | * to file data extents, and those reference counts still get |
| 1154 | * updated (along with back refs to the log tree). |
| 1155 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1156 | root->ref_cows = 0; |
| 1157 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1158 | leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, |
| 1159 | BTRFS_TREE_LOG_OBJECTID, NULL, 0, 0, 0); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1160 | if (IS_ERR(leaf)) { |
| 1161 | kfree(root); |
| 1162 | return ERR_CAST(leaf); |
| 1163 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1164 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1165 | memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); |
| 1166 | btrfs_set_header_bytenr(leaf, leaf->start); |
| 1167 | btrfs_set_header_generation(leaf, trans->transid); |
| 1168 | btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); |
| 1169 | btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1170 | root->node = leaf; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1171 | |
| 1172 | write_extent_buffer(root->node, root->fs_info->fsid, |
| 1173 | (unsigned long)btrfs_header_fsid(root->node), |
| 1174 | BTRFS_FSID_SIZE); |
| 1175 | btrfs_mark_buffer_dirty(root->node); |
| 1176 | btrfs_tree_unlock(root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1177 | return root; |
| 1178 | } |
| 1179 | |
| 1180 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
| 1181 | struct btrfs_fs_info *fs_info) |
| 1182 | { |
| 1183 | struct btrfs_root *log_root; |
| 1184 | |
| 1185 | log_root = alloc_log_tree(trans, fs_info); |
| 1186 | if (IS_ERR(log_root)) |
| 1187 | return PTR_ERR(log_root); |
| 1188 | WARN_ON(fs_info->log_root_tree); |
| 1189 | fs_info->log_root_tree = log_root; |
| 1190 | return 0; |
| 1191 | } |
| 1192 | |
| 1193 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
| 1194 | struct btrfs_root *root) |
| 1195 | { |
| 1196 | struct btrfs_root *log_root; |
| 1197 | struct btrfs_inode_item *inode_item; |
| 1198 | |
| 1199 | log_root = alloc_log_tree(trans, root->fs_info); |
| 1200 | if (IS_ERR(log_root)) |
| 1201 | return PTR_ERR(log_root); |
| 1202 | |
| 1203 | log_root->last_trans = trans->transid; |
| 1204 | log_root->root_key.offset = root->root_key.objectid; |
| 1205 | |
| 1206 | inode_item = &log_root->root_item.inode; |
| 1207 | inode_item->generation = cpu_to_le64(1); |
| 1208 | inode_item->size = cpu_to_le64(3); |
| 1209 | inode_item->nlink = cpu_to_le32(1); |
| 1210 | inode_item->nbytes = cpu_to_le64(root->leafsize); |
| 1211 | inode_item->mode = cpu_to_le32(S_IFDIR | 0755); |
| 1212 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1213 | btrfs_set_root_node(&log_root->root_item, log_root->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1214 | |
| 1215 | WARN_ON(root->log_root); |
| 1216 | root->log_root = log_root; |
| 1217 | root->log_transid = 0; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1218 | root->last_log_commit = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1219 | return 0; |
| 1220 | } |
| 1221 | |
| 1222 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, |
| 1223 | struct btrfs_key *location) |
| 1224 | { |
| 1225 | struct btrfs_root *root; |
| 1226 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1227 | struct btrfs_path *path; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1228 | struct extent_buffer *l; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1229 | u64 generation; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1230 | u32 blocksize; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1231 | int ret = 0; |
| 1232 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1233 | root = kzalloc(sizeof(*root), GFP_NOFS); |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 1234 | if (!root) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1235 | return ERR_PTR(-ENOMEM); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1236 | if (location->offset == (u64)-1) { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1237 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1238 | location->objectid, root); |
| 1239 | if (ret) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1240 | kfree(root); |
| 1241 | return ERR_PTR(ret); |
| 1242 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1243 | goto out; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1244 | } |
| 1245 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1246 | __setup_root(tree_root->nodesize, tree_root->leafsize, |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1247 | tree_root->sectorsize, tree_root->stripesize, |
| 1248 | root, fs_info, location->objectid); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1249 | |
| 1250 | path = btrfs_alloc_path(); |
| 1251 | BUG_ON(!path); |
| 1252 | ret = btrfs_search_slot(NULL, tree_root, location, path, 0, 0); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1253 | if (ret == 0) { |
| 1254 | l = path->nodes[0]; |
| 1255 | read_extent_buffer(l, &root->root_item, |
| 1256 | btrfs_item_ptr_offset(l, path->slots[0]), |
| 1257 | sizeof(root->root_item)); |
| 1258 | memcpy(&root->root_key, location, sizeof(*location)); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1259 | } |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1260 | btrfs_free_path(path); |
| 1261 | if (ret) { |
Tsutomu Itoh | 5e540f7 | 2010-12-27 06:53:10 +0000 | [diff] [blame] | 1262 | kfree(root); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1263 | if (ret > 0) |
| 1264 | ret = -ENOENT; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1265 | return ERR_PTR(ret); |
| 1266 | } |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1267 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1268 | generation = btrfs_root_generation(&root->root_item); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1269 | blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); |
| 1270 | root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1271 | blocksize, generation); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1272 | root->commit_root = btrfs_root_node(root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1273 | BUG_ON(!root->node); |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1274 | out: |
| 1275 | if (location->objectid != BTRFS_TREE_LOG_OBJECTID) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1276 | root->ref_cows = 1; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1277 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1278 | return root; |
| 1279 | } |
| 1280 | |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 1281 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, |
| 1282 | u64 root_objectid) |
| 1283 | { |
| 1284 | struct btrfs_root *root; |
| 1285 | |
| 1286 | if (root_objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1287 | return fs_info->tree_root; |
| 1288 | if (root_objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1289 | return fs_info->extent_root; |
| 1290 | |
| 1291 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1292 | (unsigned long)root_objectid); |
| 1293 | return root; |
| 1294 | } |
| 1295 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1296 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, |
| 1297 | struct btrfs_key *location) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1298 | { |
| 1299 | struct btrfs_root *root; |
| 1300 | int ret; |
| 1301 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1302 | if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) |
| 1303 | return fs_info->tree_root; |
| 1304 | if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) |
| 1305 | return fs_info->extent_root; |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 1306 | if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) |
| 1307 | return fs_info->chunk_root; |
| 1308 | if (location->objectid == BTRFS_DEV_TREE_OBJECTID) |
| 1309 | return fs_info->dev_root; |
Yan Zheng | 0403e47 | 2008-12-10 20:32:51 -0500 | [diff] [blame] | 1310 | if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) |
| 1311 | return fs_info->csum_root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1312 | again: |
| 1313 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1314 | root = radix_tree_lookup(&fs_info->fs_roots_radix, |
| 1315 | (unsigned long)location->objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1316 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1317 | if (root) |
| 1318 | return root; |
| 1319 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1320 | root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 1321 | if (IS_ERR(root)) |
| 1322 | return root; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1323 | |
| 1324 | set_anon_super(&root->anon_super, NULL); |
| 1325 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1326 | if (btrfs_root_refs(&root->root_item) == 0) { |
| 1327 | ret = -ENOENT; |
| 1328 | goto fail; |
| 1329 | } |
| 1330 | |
| 1331 | ret = btrfs_find_orphan_item(fs_info->tree_root, location->objectid); |
| 1332 | if (ret < 0) |
| 1333 | goto fail; |
| 1334 | if (ret == 0) |
| 1335 | root->orphan_item_inserted = 1; |
| 1336 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1337 | ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); |
| 1338 | if (ret) |
| 1339 | goto fail; |
| 1340 | |
| 1341 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 1342 | ret = radix_tree_insert(&fs_info->fs_roots_radix, |
| 1343 | (unsigned long)root->root_key.objectid, |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1344 | root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1345 | if (ret == 0) |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1346 | root->in_radix = 1; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1347 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1348 | spin_unlock(&fs_info->fs_roots_radix_lock); |
| 1349 | radix_tree_preload_end(); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1350 | if (ret) { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1351 | if (ret == -EEXIST) { |
| 1352 | free_fs_root(root); |
| 1353 | goto again; |
| 1354 | } |
| 1355 | goto fail; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1356 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1357 | |
| 1358 | ret = btrfs_find_dead_roots(fs_info->tree_root, |
| 1359 | root->root_key.objectid); |
| 1360 | WARN_ON(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1361 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1362 | fail: |
| 1363 | free_fs_root(root); |
| 1364 | return ERR_PTR(ret); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
| 1368 | struct btrfs_key *location, |
| 1369 | const char *name, int namelen) |
| 1370 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1371 | return btrfs_read_fs_root_no_name(fs_info, location); |
| 1372 | #if 0 |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1373 | struct btrfs_root *root; |
| 1374 | int ret; |
| 1375 | |
| 1376 | root = btrfs_read_fs_root_no_name(fs_info, location); |
| 1377 | if (!root) |
| 1378 | return NULL; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1379 | |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 1380 | if (root->in_sysfs) |
| 1381 | return root; |
| 1382 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1383 | ret = btrfs_set_root_name(root, name, namelen); |
| 1384 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1385 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1386 | kfree(root); |
| 1387 | return ERR_PTR(ret); |
| 1388 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1389 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1390 | ret = btrfs_sysfs_add_root(root); |
| 1391 | if (ret) { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1392 | free_extent_buffer(root->node); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1393 | kfree(root->name); |
| 1394 | kfree(root); |
| 1395 | return ERR_PTR(ret); |
| 1396 | } |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 1397 | root->in_sysfs = 1; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1398 | return root; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1399 | #endif |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1400 | } |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1401 | |
| 1402 | static int btrfs_congested_fn(void *congested_data, int bdi_bits) |
| 1403 | { |
| 1404 | struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; |
| 1405 | int ret = 0; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1406 | struct btrfs_device *device; |
| 1407 | struct backing_dev_info *bdi; |
Chris Mason | b7967db | 2009-04-27 07:29:04 -0400 | [diff] [blame] | 1408 | |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 1409 | list_for_each_entry(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1410 | if (!device->bdev) |
| 1411 | continue; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1412 | bdi = blk_get_backing_dev_info(device->bdev); |
| 1413 | if (bdi && bdi_congested(bdi, bdi_bits)) { |
| 1414 | ret = 1; |
| 1415 | break; |
| 1416 | } |
| 1417 | } |
| 1418 | return ret; |
| 1419 | } |
| 1420 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1421 | /* |
| 1422 | * this unplugs every device on the box, and it is only used when page |
| 1423 | * is null |
| 1424 | */ |
| 1425 | static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
| 1426 | { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1427 | struct btrfs_device *device; |
| 1428 | struct btrfs_fs_info *info; |
| 1429 | |
| 1430 | info = (struct btrfs_fs_info *)bdi->unplug_io_data; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 1431 | list_for_each_entry(device, &info->fs_devices->devices, dev_list) { |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1432 | if (!device->bdev) |
| 1433 | continue; |
| 1434 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1435 | bdi = blk_get_backing_dev_info(device->bdev); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1436 | if (bdi->unplug_io_fn) |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1437 | bdi->unplug_io_fn(bdi, page); |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1438 | } |
| 1439 | } |
| 1440 | |
Christoph Hellwig | b295086 | 2008-12-02 09:54:17 -0500 | [diff] [blame] | 1441 | static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1442 | { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1443 | struct inode *inode; |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1444 | struct extent_map_tree *em_tree; |
| 1445 | struct extent_map *em; |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1446 | struct address_space *mapping; |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1447 | u64 offset; |
| 1448 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1449 | /* the generic O_DIRECT read code does this */ |
Chris Mason | 9f0ba5b | 2008-11-18 10:31:22 -0500 | [diff] [blame] | 1450 | if (1 || !page) { |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1451 | __unplug_io_fn(bdi, page); |
| 1452 | return; |
| 1453 | } |
| 1454 | |
Chris Mason | bcbfce8 | 2008-04-22 13:26:47 -0400 | [diff] [blame] | 1455 | /* |
| 1456 | * page->mapping may change at any time. Get a consistent copy |
| 1457 | * and use that for everything below |
| 1458 | */ |
| 1459 | smp_mb(); |
| 1460 | mapping = page->mapping; |
| 1461 | if (!mapping) |
| 1462 | return; |
| 1463 | |
| 1464 | inode = mapping->host; |
Chris Mason | 240d5d4 | 2008-11-10 13:08:31 -0500 | [diff] [blame] | 1465 | |
| 1466 | /* |
| 1467 | * don't do the expensive searching for a small number of |
| 1468 | * devices |
| 1469 | */ |
| 1470 | if (BTRFS_I(inode)->root->fs_info->fs_devices->open_devices <= 2) { |
| 1471 | __unplug_io_fn(bdi, page); |
| 1472 | return; |
| 1473 | } |
| 1474 | |
Chris Mason | 38b6698 | 2008-04-22 09:22:11 -0400 | [diff] [blame] | 1475 | offset = page_offset(page); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1476 | |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1477 | em_tree = &BTRFS_I(inode)->extent_tree; |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 1478 | read_lock(&em_tree->lock); |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1479 | em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE); |
Chris Mason | 890871b | 2009-09-02 16:24:52 -0400 | [diff] [blame] | 1480 | read_unlock(&em_tree->lock); |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1481 | if (!em) { |
| 1482 | __unplug_io_fn(bdi, page); |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1483 | return; |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1484 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1485 | |
Chris Mason | 8964222 | 2008-07-24 09:41:53 -0400 | [diff] [blame] | 1486 | if (em->block_start >= EXTENT_MAP_LAST_BYTE) { |
| 1487 | free_extent_map(em); |
| 1488 | __unplug_io_fn(bdi, page); |
| 1489 | return; |
| 1490 | } |
Chris Mason | f2d8d74 | 2008-04-21 10:03:05 -0400 | [diff] [blame] | 1491 | offset = offset - em->start; |
| 1492 | btrfs_unplug_page(&BTRFS_I(inode)->root->fs_info->mapping_tree, |
| 1493 | em->block_start + offset, page); |
| 1494 | free_extent_map(em); |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1495 | } |
| 1496 | |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1497 | /* |
| 1498 | * If this fails, caller must call bdi_destroy() to get rid of the |
| 1499 | * bdi again. |
| 1500 | */ |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1501 | static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) |
| 1502 | { |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1503 | int err; |
| 1504 | |
| 1505 | bdi->capabilities = BDI_CAP_MAP_COPY; |
Jens Axboe | e6d086d | 2010-04-26 10:27:54 +0200 | [diff] [blame] | 1506 | err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 1507 | if (err) |
| 1508 | return err; |
| 1509 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1510 | bdi->ra_pages = default_backing_dev_info.ra_pages; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1511 | bdi->unplug_io_fn = btrfs_unplug_io_fn; |
| 1512 | bdi->unplug_io_data = info; |
| 1513 | bdi->congested_fn = btrfs_congested_fn; |
| 1514 | bdi->congested_data = info; |
| 1515 | return 0; |
| 1516 | } |
| 1517 | |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1518 | static int bio_ready_for_csum(struct bio *bio) |
| 1519 | { |
| 1520 | u64 length = 0; |
| 1521 | u64 buf_len = 0; |
| 1522 | u64 start = 0; |
| 1523 | struct page *page; |
| 1524 | struct extent_io_tree *io_tree = NULL; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1525 | struct bio_vec *bvec; |
| 1526 | int i; |
| 1527 | int ret; |
| 1528 | |
| 1529 | bio_for_each_segment(bvec, bio, i) { |
| 1530 | page = bvec->bv_page; |
| 1531 | if (page->private == EXTENT_PAGE_PRIVATE) { |
| 1532 | length += bvec->bv_len; |
| 1533 | continue; |
| 1534 | } |
| 1535 | if (!page->private) { |
| 1536 | length += bvec->bv_len; |
| 1537 | continue; |
| 1538 | } |
| 1539 | length = bvec->bv_len; |
| 1540 | buf_len = page->private >> 2; |
| 1541 | start = page_offset(page) + bvec->bv_offset; |
| 1542 | io_tree = &BTRFS_I(page->mapping->host)->io_tree; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1543 | } |
| 1544 | /* are we fully contained in this bio? */ |
| 1545 | if (buf_len <= length) |
| 1546 | return 1; |
| 1547 | |
| 1548 | ret = extent_range_uptodate(io_tree, start + length, |
| 1549 | start + buf_len - 1); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1550 | return ret; |
| 1551 | } |
| 1552 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1553 | /* |
| 1554 | * called by the kthread helper functions to finally call the bio end_io |
| 1555 | * functions. This is where read checksum verification actually happens |
| 1556 | */ |
| 1557 | static void end_workqueue_fn(struct btrfs_work *work) |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1558 | { |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1559 | struct bio *bio; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1560 | struct end_io_wq *end_io_wq; |
| 1561 | struct btrfs_fs_info *fs_info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1562 | int error; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1563 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1564 | end_io_wq = container_of(work, struct end_io_wq, work); |
| 1565 | bio = end_io_wq->bio; |
| 1566 | fs_info = end_io_wq->info; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1567 | |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1568 | /* metadata bio reads are special because the whole tree block must |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1569 | * be checksummed at once. This makes sure the entire block is in |
| 1570 | * ram and up to date before trying to verify things. For |
| 1571 | * blocksize <= pagesize, it is basically a noop |
| 1572 | */ |
Christoph Hellwig | 7b6d91d | 2010-08-07 18:20:39 +0200 | [diff] [blame] | 1573 | if (!(bio->bi_rw & REQ_WRITE) && end_io_wq->metadata && |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1574 | !bio_ready_for_csum(bio)) { |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1575 | btrfs_queue_worker(&fs_info->endio_meta_workers, |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1576 | &end_io_wq->work); |
| 1577 | return; |
| 1578 | } |
| 1579 | error = end_io_wq->error; |
| 1580 | bio->bi_private = end_io_wq->private; |
| 1581 | bio->bi_end_io = end_io_wq->end_io; |
| 1582 | kfree(end_io_wq); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1583 | bio_endio(bio, error); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 1584 | } |
| 1585 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1586 | static int cleaner_kthread(void *arg) |
| 1587 | { |
| 1588 | struct btrfs_root *root = arg; |
| 1589 | |
| 1590 | do { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1591 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1592 | |
| 1593 | if (!(root->fs_info->sb->s_flags & MS_RDONLY) && |
| 1594 | mutex_trylock(&root->fs_info->cleaner_mutex)) { |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1595 | btrfs_run_delayed_iputs(root); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1596 | btrfs_clean_old_snapshots(root); |
| 1597 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 1598 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1599 | |
| 1600 | if (freezing(current)) { |
| 1601 | refrigerator(); |
| 1602 | } else { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1603 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1604 | if (!kthread_should_stop()) |
| 1605 | schedule(); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1606 | __set_current_state(TASK_RUNNING); |
| 1607 | } |
| 1608 | } while (!kthread_should_stop()); |
| 1609 | return 0; |
| 1610 | } |
| 1611 | |
| 1612 | static int transaction_kthread(void *arg) |
| 1613 | { |
| 1614 | struct btrfs_root *root = arg; |
| 1615 | struct btrfs_trans_handle *trans; |
| 1616 | struct btrfs_transaction *cur; |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1617 | u64 transid; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1618 | unsigned long now; |
| 1619 | unsigned long delay; |
| 1620 | int ret; |
| 1621 | |
| 1622 | do { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1623 | delay = HZ * 30; |
| 1624 | vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE); |
| 1625 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 1626 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1627 | spin_lock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1628 | cur = root->fs_info->running_transaction; |
| 1629 | if (!cur) { |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1630 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1631 | goto sleep; |
| 1632 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1633 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1634 | now = get_seconds(); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1635 | if (!cur->blocked && |
| 1636 | (now < cur->start_time || now - cur->start_time < 30)) { |
| 1637 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1638 | delay = HZ * 5; |
| 1639 | goto sleep; |
| 1640 | } |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1641 | transid = cur->transid; |
| 1642 | spin_unlock(&root->fs_info->new_trans_lock); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 1643 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1644 | trans = btrfs_join_transaction(root, 1); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 1645 | BUG_ON(IS_ERR(trans)); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1646 | if (transid == trans->transid) { |
| 1647 | ret = btrfs_commit_transaction(trans, root); |
| 1648 | BUG_ON(ret); |
| 1649 | } else { |
| 1650 | btrfs_end_transaction(trans, root); |
| 1651 | } |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1652 | sleep: |
| 1653 | wake_up_process(root->fs_info->cleaner_kthread); |
| 1654 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 1655 | |
| 1656 | if (freezing(current)) { |
| 1657 | refrigerator(); |
| 1658 | } else { |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1659 | set_current_state(TASK_INTERRUPTIBLE); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1660 | if (!kthread_should_stop() && |
| 1661 | !btrfs_transaction_blocked(root->fs_info)) |
| 1662 | schedule_timeout(delay); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1663 | __set_current_state(TASK_RUNNING); |
| 1664 | } |
| 1665 | } while (!kthread_should_stop()); |
| 1666 | return 0; |
| 1667 | } |
| 1668 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1669 | struct btrfs_root *open_ctree(struct super_block *sb, |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1670 | struct btrfs_fs_devices *fs_devices, |
| 1671 | char *options) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1672 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1673 | u32 sectorsize; |
| 1674 | u32 nodesize; |
| 1675 | u32 leafsize; |
| 1676 | u32 blocksize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1677 | u32 stripesize; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1678 | u64 generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1679 | u64 features; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1680 | struct btrfs_key location; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1681 | struct buffer_head *bh; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1682 | struct btrfs_root *extent_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1683 | GFP_NOFS); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1684 | struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root), |
| 1685 | GFP_NOFS); |
Josef Bacik | 450ba0e | 2010-11-19 14:59:15 -0500 | [diff] [blame] | 1686 | struct btrfs_root *tree_root = btrfs_sb(sb); |
| 1687 | struct btrfs_fs_info *fs_info = tree_root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1688 | struct btrfs_root *chunk_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1689 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1690 | struct btrfs_root *dev_root = kzalloc(sizeof(struct btrfs_root), |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1691 | GFP_NOFS); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1692 | struct btrfs_root *log_tree_root; |
| 1693 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1694 | int ret; |
Yan | e58ca02 | 2008-04-01 11:21:34 -0400 | [diff] [blame] | 1695 | int err = -EINVAL; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1696 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1697 | struct btrfs_super_block *disk_super; |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 1698 | |
Jim Meyering | 0463bb4 | 2008-10-01 19:09:04 -0400 | [diff] [blame] | 1699 | if (!extent_root || !tree_root || !fs_info || |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1700 | !chunk_root || !dev_root || !csum_root) { |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1701 | err = -ENOMEM; |
| 1702 | goto fail; |
| 1703 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1704 | |
| 1705 | ret = init_srcu_struct(&fs_info->subvol_srcu); |
| 1706 | if (ret) { |
| 1707 | err = ret; |
| 1708 | goto fail; |
| 1709 | } |
| 1710 | |
| 1711 | ret = setup_bdi(fs_info, &fs_info->bdi); |
| 1712 | if (ret) { |
| 1713 | err = ret; |
| 1714 | goto fail_srcu; |
| 1715 | } |
| 1716 | |
| 1717 | fs_info->btree_inode = new_inode(sb); |
| 1718 | if (!fs_info->btree_inode) { |
| 1719 | err = -ENOMEM; |
| 1720 | goto fail_bdi; |
| 1721 | } |
| 1722 | |
| 1723 | INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1724 | INIT_LIST_HEAD(&fs_info->trans_list); |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1725 | INIT_LIST_HEAD(&fs_info->dead_roots); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1726 | INIT_LIST_HEAD(&fs_info->delayed_iputs); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1727 | INIT_LIST_HEAD(&fs_info->hashers); |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1728 | INIT_LIST_HEAD(&fs_info->delalloc_inodes); |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1729 | INIT_LIST_HEAD(&fs_info->ordered_operations); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1730 | INIT_LIST_HEAD(&fs_info->caching_block_groups); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1731 | spin_lock_init(&fs_info->delalloc_lock); |
Chris Mason | cee36a0 | 2008-01-15 08:40:48 -0500 | [diff] [blame] | 1732 | spin_lock_init(&fs_info->new_trans_lock); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1733 | spin_lock_init(&fs_info->ref_cache_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1734 | spin_lock_init(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1735 | spin_lock_init(&fs_info->delayed_iput_lock); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1736 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1737 | init_completion(&fs_info->kobj_unregister); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1738 | fs_info->tree_root = tree_root; |
| 1739 | fs_info->extent_root = extent_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1740 | fs_info->csum_root = csum_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1741 | fs_info->chunk_root = chunk_root; |
| 1742 | fs_info->dev_root = dev_root; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1743 | fs_info->fs_devices = fs_devices; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1744 | INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots); |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1745 | INIT_LIST_HEAD(&fs_info->space_info); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1746 | btrfs_mapping_init(&fs_info->mapping_tree); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1747 | btrfs_init_block_rsv(&fs_info->global_block_rsv); |
| 1748 | btrfs_init_block_rsv(&fs_info->delalloc_block_rsv); |
| 1749 | btrfs_init_block_rsv(&fs_info->trans_block_rsv); |
| 1750 | btrfs_init_block_rsv(&fs_info->chunk_block_rsv); |
| 1751 | btrfs_init_block_rsv(&fs_info->empty_block_rsv); |
| 1752 | INIT_LIST_HEAD(&fs_info->durable_block_rsv_list); |
| 1753 | mutex_init(&fs_info->durable_block_rsv_mutex); |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1754 | atomic_set(&fs_info->nr_async_submits, 0); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1755 | atomic_set(&fs_info->async_delalloc_pages, 0); |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 1756 | atomic_set(&fs_info->async_submit_draining, 0); |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1757 | atomic_set(&fs_info->nr_async_bios, 0); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1758 | fs_info->sb = sb; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 1759 | fs_info->max_inline = 8192 * 1024; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 1760 | fs_info->metadata_ratio = 0; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1761 | |
Chris Mason | b34b086 | 2008-12-19 15:43:22 -0500 | [diff] [blame] | 1762 | fs_info->thread_pool_size = min_t(unsigned long, |
| 1763 | num_online_cpus() + 2, 8); |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1764 | |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1765 | INIT_LIST_HEAD(&fs_info->ordered_extents); |
| 1766 | spin_lock_init(&fs_info->ordered_extent_lock); |
| 1767 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1768 | sb->s_blocksize = 4096; |
| 1769 | sb->s_blocksize_bits = blksize_bits(4096); |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 1770 | sb->s_bdi = &fs_info->bdi; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1771 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1772 | fs_info->btree_inode->i_ino = BTRFS_BTREE_INODE_OBJECTID; |
| 1773 | fs_info->btree_inode->i_nlink = 1; |
Chris Mason | 0afbaf8 | 2008-04-18 14:17:20 -0400 | [diff] [blame] | 1774 | /* |
| 1775 | * we set the i_size on the btree inode to the max possible int. |
| 1776 | * the real end of the address space is determined by all of |
| 1777 | * the devices in the system |
| 1778 | */ |
| 1779 | fs_info->btree_inode->i_size = OFFSET_MAX; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1780 | fs_info->btree_inode->i_mapping->a_ops = &btree_aops; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1781 | fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi; |
| 1782 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1783 | RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1784 | extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1785 | fs_info->btree_inode->i_mapping, |
| 1786 | GFP_NOFS); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1787 | extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, |
| 1788 | GFP_NOFS); |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 1789 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1790 | BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops; |
| 1791 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1792 | BTRFS_I(fs_info->btree_inode)->root = tree_root; |
| 1793 | memset(&BTRFS_I(fs_info->btree_inode)->location, 0, |
| 1794 | sizeof(struct btrfs_key)); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1795 | BTRFS_I(fs_info->btree_inode)->dummy_inode = 1; |
Chris Mason | 22b0ebd | 2007-03-30 08:47:31 -0400 | [diff] [blame] | 1796 | insert_inode_hash(fs_info->btree_inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1797 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1798 | spin_lock_init(&fs_info->block_group_cache_lock); |
Eric Paris | 6bef4d3 | 2010-02-23 19:43:04 +0000 | [diff] [blame] | 1799 | fs_info->block_group_cache_tree = RB_ROOT; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1800 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1801 | extent_io_tree_init(&fs_info->freed_extents[0], |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 1802 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1803 | extent_io_tree_init(&fs_info->freed_extents[1], |
| 1804 | fs_info->btree_inode->i_mapping, GFP_NOFS); |
| 1805 | fs_info->pinned_extents = &fs_info->freed_extents[0]; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1806 | fs_info->do_barriers = 1; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 1807 | |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1808 | |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 1809 | mutex_init(&fs_info->trans_mutex); |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1810 | mutex_init(&fs_info->ordered_operations_mutex); |
Chris Mason | 30ae846 | 2007-03-29 09:59:15 -0400 | [diff] [blame] | 1811 | mutex_init(&fs_info->tree_log_mutex); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1812 | mutex_init(&fs_info->chunk_mutex); |
| 1813 | mutex_init(&fs_info->transaction_kthread_mutex); |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1814 | mutex_init(&fs_info->cleaner_mutex); |
| 1815 | mutex_init(&fs_info->volume_mutex); |
Yan Zheng | 276e680 | 2009-07-30 09:40:40 -0400 | [diff] [blame] | 1816 | init_rwsem(&fs_info->extent_commit_sem); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1817 | init_rwsem(&fs_info->cleanup_work_sem); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1818 | init_rwsem(&fs_info->subvol_sem); |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 1819 | |
| 1820 | btrfs_init_free_cluster(&fs_info->meta_alloc_cluster); |
| 1821 | btrfs_init_free_cluster(&fs_info->data_alloc_cluster); |
| 1822 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 1823 | init_waitqueue_head(&fs_info->transaction_throttle); |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1824 | init_waitqueue_head(&fs_info->transaction_wait); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 1825 | init_waitqueue_head(&fs_info->transaction_blocked_wait); |
Chris Mason | 4854ddd | 2008-08-15 15:34:17 -0400 | [diff] [blame] | 1826 | init_waitqueue_head(&fs_info->async_submit_wait); |
Chris Mason | 9a8dd15 | 2007-02-23 08:38:36 -0500 | [diff] [blame] | 1827 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1828 | __setup_root(4096, 4096, 4096, 4096, tree_root, |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1829 | fs_info, BTRFS_ROOT_TREE_OBJECTID); |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 1830 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 1831 | bh = btrfs_read_dev_super(fs_devices->latest_bdev); |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 1832 | if (!bh) { |
| 1833 | err = -EINVAL; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1834 | goto fail_iput; |
Dave Young | 20b4507 | 2011-01-08 10:09:13 +0000 | [diff] [blame] | 1835 | } |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1836 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1837 | memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy)); |
Yan Zheng | 2d69a0f | 2009-01-05 15:43:42 -0500 | [diff] [blame] | 1838 | memcpy(&fs_info->super_for_commit, &fs_info->super_copy, |
| 1839 | sizeof(fs_info->super_for_commit)); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1840 | brelse(bh); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1841 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1842 | memcpy(fs_info->fsid, fs_info->super_copy.fsid, BTRFS_FSID_SIZE); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1843 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1844 | disk_super = &fs_info->super_copy; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1845 | if (!btrfs_super_root(disk_super)) |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1846 | goto fail_iput; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1847 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 1848 | /* check FS state, whether FS is broken. */ |
| 1849 | fs_info->fs_state |= btrfs_super_flags(disk_super); |
| 1850 | |
| 1851 | btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY); |
| 1852 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1853 | ret = btrfs_parse_options(tree_root, options); |
| 1854 | if (ret) { |
| 1855 | err = ret; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1856 | goto fail_iput; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1857 | } |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1858 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1859 | features = btrfs_super_incompat_flags(disk_super) & |
| 1860 | ~BTRFS_FEATURE_INCOMPAT_SUPP; |
| 1861 | if (features) { |
| 1862 | printk(KERN_ERR "BTRFS: couldn't mount because of " |
| 1863 | "unsupported optional features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 1864 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1865 | err = -EINVAL; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1866 | goto fail_iput; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1867 | } |
| 1868 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1869 | features = btrfs_super_incompat_flags(disk_super); |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 1870 | features |= BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF; |
| 1871 | if (tree_root->fs_info->compress_type & BTRFS_COMPRESS_LZO) |
| 1872 | features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; |
| 1873 | btrfs_set_super_incompat_flags(disk_super, features); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1874 | |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1875 | features = btrfs_super_compat_ro_flags(disk_super) & |
| 1876 | ~BTRFS_FEATURE_COMPAT_RO_SUPP; |
| 1877 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 1878 | printk(KERN_ERR "BTRFS: couldn't mount RDWR because of " |
| 1879 | "unsupported option features (%Lx).\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 1880 | (unsigned long long)features); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1881 | err = -EINVAL; |
Josef Bacik | c6e2bac | 2008-12-02 06:36:10 -0500 | [diff] [blame] | 1882 | goto fail_iput; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1883 | } |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1884 | |
| 1885 | btrfs_init_workers(&fs_info->generic_worker, |
| 1886 | "genwork", 1, NULL); |
| 1887 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1888 | btrfs_init_workers(&fs_info->workers, "worker", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1889 | fs_info->thread_pool_size, |
| 1890 | &fs_info->generic_worker); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1891 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1892 | btrfs_init_workers(&fs_info->delalloc_workers, "delalloc", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1893 | fs_info->thread_pool_size, |
| 1894 | &fs_info->generic_worker); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1895 | |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1896 | btrfs_init_workers(&fs_info->submit_workers, "submit", |
Chris Mason | b720d20 | 2008-08-15 15:34:14 -0400 | [diff] [blame] | 1897 | min_t(u64, fs_devices->num_devices, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1898 | fs_info->thread_pool_size), |
| 1899 | &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1900 | |
| 1901 | /* a higher idle thresh on the submit workers makes it much more |
| 1902 | * likely that bios will be send down in a sane order to the |
| 1903 | * devices |
| 1904 | */ |
| 1905 | fs_info->submit_workers.idle_thresh = 64; |
Chris Mason | 5386323 | 2008-08-15 15:34:18 -0400 | [diff] [blame] | 1906 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1907 | fs_info->workers.idle_thresh = 16; |
Chris Mason | 4a69a41 | 2008-11-06 22:03:00 -0500 | [diff] [blame] | 1908 | fs_info->workers.ordered = 1; |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1909 | |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1910 | fs_info->delalloc_workers.idle_thresh = 2; |
| 1911 | fs_info->delalloc_workers.ordered = 1; |
| 1912 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1913 | btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1, |
| 1914 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1915 | btrfs_init_workers(&fs_info->endio_workers, "endio", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1916 | fs_info->thread_pool_size, |
| 1917 | &fs_info->generic_worker); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1918 | btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1919 | fs_info->thread_pool_size, |
| 1920 | &fs_info->generic_worker); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1921 | btrfs_init_workers(&fs_info->endio_meta_write_workers, |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1922 | "endio-meta-write", fs_info->thread_pool_size, |
| 1923 | &fs_info->generic_worker); |
Chris Mason | 5443be4 | 2008-08-15 15:34:16 -0400 | [diff] [blame] | 1924 | btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1925 | fs_info->thread_pool_size, |
| 1926 | &fs_info->generic_worker); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 1927 | btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", |
| 1928 | 1, &fs_info->generic_worker); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 1929 | |
| 1930 | /* |
| 1931 | * endios are largely parallel and should have a very |
| 1932 | * low idle thresh |
| 1933 | */ |
| 1934 | fs_info->endio_workers.idle_thresh = 4; |
Chris Mason | b51912c | 2009-02-04 09:23:24 -0500 | [diff] [blame] | 1935 | fs_info->endio_meta_workers.idle_thresh = 4; |
| 1936 | |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 1937 | fs_info->endio_write_workers.idle_thresh = 2; |
| 1938 | fs_info->endio_meta_write_workers.idle_thresh = 2; |
| 1939 | |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1940 | btrfs_start_workers(&fs_info->workers, 1); |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1941 | btrfs_start_workers(&fs_info->generic_worker, 1); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1942 | btrfs_start_workers(&fs_info->submit_workers, 1); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1943 | btrfs_start_workers(&fs_info->delalloc_workers, 1); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1944 | btrfs_start_workers(&fs_info->fixup_workers, 1); |
Chris Mason | 9042846 | 2009-08-04 16:56:34 -0400 | [diff] [blame] | 1945 | btrfs_start_workers(&fs_info->endio_workers, 1); |
| 1946 | btrfs_start_workers(&fs_info->endio_meta_workers, 1); |
| 1947 | btrfs_start_workers(&fs_info->endio_meta_write_workers, 1); |
| 1948 | btrfs_start_workers(&fs_info->endio_write_workers, 1); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 1949 | btrfs_start_workers(&fs_info->endio_freespace_worker, 1); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1950 | |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1951 | fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1952 | fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, |
| 1953 | 4 * 1024 * 1024 / PAGE_CACHE_SIZE); |
Chris Mason | 4575c9c | 2008-04-18 16:13:31 -0400 | [diff] [blame] | 1954 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1955 | nodesize = btrfs_super_nodesize(disk_super); |
| 1956 | leafsize = btrfs_super_leafsize(disk_super); |
| 1957 | sectorsize = btrfs_super_sectorsize(disk_super); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1958 | stripesize = btrfs_super_stripesize(disk_super); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1959 | tree_root->nodesize = nodesize; |
| 1960 | tree_root->leafsize = leafsize; |
| 1961 | tree_root->sectorsize = sectorsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1962 | tree_root->stripesize = stripesize; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 1963 | |
| 1964 | sb->s_blocksize = sectorsize; |
| 1965 | sb->s_blocksize_bits = blksize_bits(sectorsize); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1966 | |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1967 | if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, |
| 1968 | sizeof(disk_super->magic))) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1969 | printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1970 | goto fail_sb_buffer; |
| 1971 | } |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1972 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1973 | mutex_lock(&fs_info->chunk_mutex); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 1974 | ret = btrfs_read_sys_array(tree_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1975 | mutex_unlock(&fs_info->chunk_mutex); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1976 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1977 | printk(KERN_WARNING "btrfs: failed to read the system " |
| 1978 | "array on %s\n", sb->s_id); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1979 | goto fail_sb_buffer; |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 1980 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1981 | |
| 1982 | blocksize = btrfs_level_size(tree_root, |
| 1983 | btrfs_super_chunk_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1984 | generation = btrfs_super_chunk_root_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1985 | |
| 1986 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 1987 | chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); |
| 1988 | |
| 1989 | chunk_root->node = read_tree_block(chunk_root, |
| 1990 | btrfs_super_chunk_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 1991 | blocksize, generation); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1992 | BUG_ON(!chunk_root->node); |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 1993 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) { |
| 1994 | printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n", |
| 1995 | sb->s_id); |
| 1996 | goto fail_chunk_root; |
| 1997 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1998 | btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); |
| 1999 | chunk_root->commit_root = btrfs_root_node(chunk_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2000 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2001 | read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2002 | (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node), |
| 2003 | BTRFS_UUID_SIZE); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2004 | |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2005 | mutex_lock(&fs_info->chunk_mutex); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2006 | ret = btrfs_read_chunk_tree(chunk_root); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2007 | mutex_unlock(&fs_info->chunk_mutex); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2008 | if (ret) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2009 | printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n", |
| 2010 | sb->s_id); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2011 | goto fail_chunk_root; |
| 2012 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2013 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2014 | btrfs_close_extra_devices(fs_devices); |
| 2015 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2016 | blocksize = btrfs_level_size(tree_root, |
| 2017 | btrfs_super_root_level(disk_super)); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2018 | generation = btrfs_super_generation(disk_super); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2019 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2020 | tree_root->node = read_tree_block(tree_root, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2021 | btrfs_super_root(disk_super), |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2022 | blocksize, generation); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2023 | if (!tree_root->node) |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2024 | goto fail_chunk_root; |
David Woodhouse | 8312194 | 2009-07-22 16:52:13 -0400 | [diff] [blame] | 2025 | if (!test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) { |
| 2026 | printk(KERN_WARNING "btrfs: failed to read tree root on %s\n", |
| 2027 | sb->s_id); |
| 2028 | goto fail_tree_root; |
| 2029 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2030 | btrfs_set_root_node(&tree_root->root_item, tree_root->node); |
| 2031 | tree_root->commit_root = btrfs_root_node(tree_root); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2032 | |
| 2033 | ret = find_and_setup_root(tree_root, fs_info, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2034 | BTRFS_EXTENT_TREE_OBJECTID, extent_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2035 | if (ret) |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2036 | goto fail_tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2037 | extent_root->track_dirty = 1; |
| 2038 | |
| 2039 | ret = find_and_setup_root(tree_root, fs_info, |
| 2040 | BTRFS_DEV_TREE_OBJECTID, dev_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2041 | if (ret) |
| 2042 | goto fail_extent_root; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2043 | dev_root->track_dirty = 1; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 2044 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2045 | ret = find_and_setup_root(tree_root, fs_info, |
| 2046 | BTRFS_CSUM_TREE_OBJECTID, csum_root); |
| 2047 | if (ret) |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2048 | goto fail_dev_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2049 | |
| 2050 | csum_root->track_dirty = 1; |
| 2051 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2052 | fs_info->generation = generation; |
| 2053 | fs_info->last_trans_committed = generation; |
| 2054 | fs_info->data_alloc_profile = (u64)-1; |
| 2055 | fs_info->metadata_alloc_profile = (u64)-1; |
| 2056 | fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; |
| 2057 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2058 | ret = btrfs_read_block_groups(extent_root); |
| 2059 | if (ret) { |
| 2060 | printk(KERN_ERR "Failed to read block groups: %d\n", ret); |
| 2061 | goto fail_block_groups; |
| 2062 | } |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2063 | |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2064 | fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, |
| 2065 | "btrfs-cleaner"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2066 | if (IS_ERR(fs_info->cleaner_kthread)) |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2067 | goto fail_block_groups; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2068 | |
| 2069 | fs_info->transaction_kthread = kthread_run(transaction_kthread, |
| 2070 | tree_root, |
| 2071 | "btrfs-transaction"); |
Qinghuang Feng | 57506d5 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2072 | if (IS_ERR(fs_info->transaction_kthread)) |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2073 | goto fail_cleaner; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2074 | |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2075 | if (!btrfs_test_opt(tree_root, SSD) && |
| 2076 | !btrfs_test_opt(tree_root, NOSSD) && |
| 2077 | !fs_info->fs_devices->rotating) { |
| 2078 | printk(KERN_INFO "Btrfs detected SSD devices, enabling SSD " |
| 2079 | "mode\n"); |
| 2080 | btrfs_set_opt(fs_info->mount_opt, SSD); |
| 2081 | } |
| 2082 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2083 | /* do not make disk changes in broken FS */ |
| 2084 | if (btrfs_super_log_root(disk_super) != 0 && |
| 2085 | !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2086 | u64 bytenr = btrfs_super_log_root(disk_super); |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 2087 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2088 | if (fs_devices->rw_devices == 0) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2089 | printk(KERN_WARNING "Btrfs log replay required " |
| 2090 | "on RO media\n"); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2091 | err = -EIO; |
| 2092 | goto fail_trans_kthread; |
| 2093 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2094 | blocksize = |
| 2095 | btrfs_level_size(tree_root, |
| 2096 | btrfs_super_log_root_level(disk_super)); |
| 2097 | |
Dan Carpenter | 676e4c8 | 2010-05-29 09:43:07 +0000 | [diff] [blame] | 2098 | log_tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); |
| 2099 | if (!log_tree_root) { |
| 2100 | err = -ENOMEM; |
| 2101 | goto fail_trans_kthread; |
| 2102 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2103 | |
| 2104 | __setup_root(nodesize, leafsize, sectorsize, stripesize, |
| 2105 | log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID); |
| 2106 | |
| 2107 | log_tree_root->node = read_tree_block(tree_root, bytenr, |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2108 | blocksize, |
| 2109 | generation + 1); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2110 | ret = btrfs_recover_log_trees(log_tree_root); |
| 2111 | BUG_ON(ret); |
Yan Zheng | e556ce2 | 2008-11-20 10:25:19 -0500 | [diff] [blame] | 2112 | |
| 2113 | if (sb->s_flags & MS_RDONLY) { |
| 2114 | ret = btrfs_commit_super(tree_root); |
| 2115 | BUG_ON(ret); |
| 2116 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2117 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2118 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2119 | ret = btrfs_find_orphan_roots(tree_root); |
| 2120 | BUG_ON(ret); |
| 2121 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2122 | if (!(sb->s_flags & MS_RDONLY)) { |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2123 | ret = btrfs_cleanup_fs_roots(fs_info); |
| 2124 | BUG_ON(ret); |
| 2125 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2126 | ret = btrfs_recover_relocation(tree_root); |
Miao Xie | d7ce584 | 2010-02-02 08:46:44 +0000 | [diff] [blame] | 2127 | if (ret < 0) { |
| 2128 | printk(KERN_WARNING |
| 2129 | "btrfs: failed to recover relocation\n"); |
| 2130 | err = -EINVAL; |
| 2131 | goto fail_trans_kthread; |
| 2132 | } |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2133 | } |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2134 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2135 | location.objectid = BTRFS_FS_TREE_OBJECTID; |
| 2136 | location.type = BTRFS_ROOT_ITEM_KEY; |
| 2137 | location.offset = (u64)-1; |
| 2138 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2139 | fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location); |
| 2140 | if (!fs_info->fs_root) |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2141 | goto fail_trans_kthread; |
Dan Carpenter | 3140c9a | 2010-05-29 09:44:10 +0000 | [diff] [blame] | 2142 | if (IS_ERR(fs_info->fs_root)) { |
| 2143 | err = PTR_ERR(fs_info->fs_root); |
| 2144 | goto fail_trans_kthread; |
| 2145 | } |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 2146 | |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2147 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2148 | down_read(&fs_info->cleanup_work_sem); |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2149 | err = btrfs_orphan_cleanup(fs_info->fs_root); |
| 2150 | if (!err) |
| 2151 | err = btrfs_orphan_cleanup(fs_info->tree_root); |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2152 | up_read(&fs_info->cleanup_work_sem); |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2153 | if (err) { |
| 2154 | close_ctree(tree_root); |
| 2155 | return ERR_PTR(err); |
| 2156 | } |
Josef Bacik | e3acc2a | 2010-01-26 14:30:53 +0000 | [diff] [blame] | 2157 | } |
| 2158 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2159 | return tree_root; |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2160 | |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2161 | fail_trans_kthread: |
| 2162 | kthread_stop(fs_info->transaction_kthread); |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2163 | fail_cleaner: |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2164 | kthread_stop(fs_info->cleaner_kthread); |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2165 | |
| 2166 | /* |
| 2167 | * make sure we're done with the btree inode before we stop our |
| 2168 | * kthreads |
| 2169 | */ |
| 2170 | filemap_write_and_wait(fs_info->btree_inode->i_mapping); |
| 2171 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
| 2172 | |
Josef Bacik | 1b1d1f6 | 2010-03-19 20:49:55 +0000 | [diff] [blame] | 2173 | fail_block_groups: |
| 2174 | btrfs_free_block_groups(fs_info); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2175 | free_extent_buffer(csum_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2176 | free_extent_buffer(csum_root->commit_root); |
| 2177 | fail_dev_root: |
| 2178 | free_extent_buffer(dev_root->node); |
| 2179 | free_extent_buffer(dev_root->commit_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2180 | fail_extent_root: |
| 2181 | free_extent_buffer(extent_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2182 | free_extent_buffer(extent_root->commit_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2183 | fail_tree_root: |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2184 | free_extent_buffer(tree_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2185 | free_extent_buffer(tree_root->commit_root); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2186 | fail_chunk_root: |
| 2187 | free_extent_buffer(chunk_root->node); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2188 | free_extent_buffer(chunk_root->commit_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2189 | fail_sb_buffer: |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2190 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2191 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2192 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2193 | btrfs_stop_workers(&fs_info->workers); |
| 2194 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2195 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2196 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2197 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2198 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2199 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2200 | fail_iput: |
Chris Mason | 7c2ca46 | 2008-11-19 15:13:35 -0500 | [diff] [blame] | 2201 | invalidate_inode_pages2(fs_info->btree_inode->i_mapping); |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 2202 | iput(fs_info->btree_inode); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2203 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2204 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 84eed90 | 2008-04-25 09:04:37 -0400 | [diff] [blame] | 2205 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Jens Axboe | ad081f1 | 2009-06-12 14:43:40 +0200 | [diff] [blame] | 2206 | fail_bdi: |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2207 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2208 | fail_srcu: |
| 2209 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Qinghuang Feng | 7e66285 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 2210 | fail: |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2211 | kfree(extent_root); |
| 2212 | kfree(tree_root); |
| 2213 | kfree(fs_info); |
Jim Meyering | 83afeac | 2008-10-01 19:09:51 -0400 | [diff] [blame] | 2214 | kfree(chunk_root); |
| 2215 | kfree(dev_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2216 | kfree(csum_root); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2217 | return ERR_PTR(err); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2218 | } |
| 2219 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2220 | static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate) |
| 2221 | { |
| 2222 | char b[BDEVNAME_SIZE]; |
| 2223 | |
| 2224 | if (uptodate) { |
| 2225 | set_buffer_uptodate(bh); |
| 2226 | } else { |
Christoph Hellwig | c3b9a62 | 2010-08-18 05:29:12 -0400 | [diff] [blame] | 2227 | if (printk_ratelimit()) { |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2228 | printk(KERN_WARNING "lost page write due to " |
| 2229 | "I/O error on %s\n", |
| 2230 | bdevname(bh->b_bdev, b)); |
| 2231 | } |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2232 | /* note, we dont' set_buffer_write_io_error because we have |
| 2233 | * our own ways of dealing with the IO errors |
| 2234 | */ |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2235 | clear_buffer_uptodate(bh); |
| 2236 | } |
| 2237 | unlock_buffer(bh); |
| 2238 | put_bh(bh); |
| 2239 | } |
| 2240 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2241 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev) |
| 2242 | { |
| 2243 | struct buffer_head *bh; |
| 2244 | struct buffer_head *latest = NULL; |
| 2245 | struct btrfs_super_block *super; |
| 2246 | int i; |
| 2247 | u64 transid = 0; |
| 2248 | u64 bytenr; |
| 2249 | |
| 2250 | /* we would like to check all the supers, but that would make |
| 2251 | * a btrfs mount succeed after a mkfs from a different FS. |
| 2252 | * So, we need to add a special mount option to scan for |
| 2253 | * later supers, using BTRFS_SUPER_MIRROR_MAX instead |
| 2254 | */ |
| 2255 | for (i = 0; i < 1; i++) { |
| 2256 | bytenr = btrfs_sb_offset(i); |
| 2257 | if (bytenr + 4096 >= i_size_read(bdev->bd_inode)) |
| 2258 | break; |
| 2259 | bh = __bread(bdev, bytenr / 4096, 4096); |
| 2260 | if (!bh) |
| 2261 | continue; |
| 2262 | |
| 2263 | super = (struct btrfs_super_block *)bh->b_data; |
| 2264 | if (btrfs_super_bytenr(super) != bytenr || |
| 2265 | strncmp((char *)(&super->magic), BTRFS_MAGIC, |
| 2266 | sizeof(super->magic))) { |
| 2267 | brelse(bh); |
| 2268 | continue; |
| 2269 | } |
| 2270 | |
| 2271 | if (!latest || btrfs_super_generation(super) > transid) { |
| 2272 | brelse(latest); |
| 2273 | latest = bh; |
| 2274 | transid = btrfs_super_generation(super); |
| 2275 | } else { |
| 2276 | brelse(bh); |
| 2277 | } |
| 2278 | } |
| 2279 | return latest; |
| 2280 | } |
| 2281 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2282 | /* |
| 2283 | * this should be called twice, once with wait == 0 and |
| 2284 | * once with wait == 1. When wait == 0 is done, all the buffer heads |
| 2285 | * we write are pinned. |
| 2286 | * |
| 2287 | * They are released when wait == 1 is done. |
| 2288 | * max_mirrors must be the same for both runs, and it indicates how |
| 2289 | * many supers on this one device should be written. |
| 2290 | * |
| 2291 | * max_mirrors == 0 means to write them all. |
| 2292 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2293 | static int write_dev_supers(struct btrfs_device *device, |
| 2294 | struct btrfs_super_block *sb, |
| 2295 | int do_barriers, int wait, int max_mirrors) |
| 2296 | { |
| 2297 | struct buffer_head *bh; |
| 2298 | int i; |
| 2299 | int ret; |
| 2300 | int errors = 0; |
| 2301 | u32 crc; |
| 2302 | u64 bytenr; |
| 2303 | int last_barrier = 0; |
| 2304 | |
| 2305 | if (max_mirrors == 0) |
| 2306 | max_mirrors = BTRFS_SUPER_MIRROR_MAX; |
| 2307 | |
| 2308 | /* make sure only the last submit_bh does a barrier */ |
| 2309 | if (do_barriers) { |
| 2310 | for (i = 0; i < max_mirrors; i++) { |
| 2311 | bytenr = btrfs_sb_offset(i); |
| 2312 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= |
| 2313 | device->total_bytes) |
| 2314 | break; |
| 2315 | last_barrier = i; |
| 2316 | } |
| 2317 | } |
| 2318 | |
| 2319 | for (i = 0; i < max_mirrors; i++) { |
| 2320 | bytenr = btrfs_sb_offset(i); |
| 2321 | if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes) |
| 2322 | break; |
| 2323 | |
| 2324 | if (wait) { |
| 2325 | bh = __find_get_block(device->bdev, bytenr / 4096, |
| 2326 | BTRFS_SUPER_INFO_SIZE); |
| 2327 | BUG_ON(!bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2328 | wait_on_buffer(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2329 | if (!buffer_uptodate(bh)) |
| 2330 | errors++; |
| 2331 | |
| 2332 | /* drop our reference */ |
| 2333 | brelse(bh); |
| 2334 | |
| 2335 | /* drop the reference from the wait == 0 run */ |
| 2336 | brelse(bh); |
| 2337 | continue; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2338 | } else { |
| 2339 | btrfs_set_super_bytenr(sb, bytenr); |
| 2340 | |
| 2341 | crc = ~(u32)0; |
| 2342 | crc = btrfs_csum_data(NULL, (char *)sb + |
| 2343 | BTRFS_CSUM_SIZE, crc, |
| 2344 | BTRFS_SUPER_INFO_SIZE - |
| 2345 | BTRFS_CSUM_SIZE); |
| 2346 | btrfs_csum_final(crc, sb->csum); |
| 2347 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2348 | /* |
| 2349 | * one reference for us, and we leave it for the |
| 2350 | * caller |
| 2351 | */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2352 | bh = __getblk(device->bdev, bytenr / 4096, |
| 2353 | BTRFS_SUPER_INFO_SIZE); |
| 2354 | memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE); |
| 2355 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2356 | /* one reference for submit_bh */ |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2357 | get_bh(bh); |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2358 | |
| 2359 | set_buffer_uptodate(bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2360 | lock_buffer(bh); |
| 2361 | bh->b_end_io = btrfs_end_buffer_write_sync; |
| 2362 | } |
| 2363 | |
Christoph Hellwig | c3b9a62 | 2010-08-18 05:29:12 -0400 | [diff] [blame] | 2364 | if (i == last_barrier && do_barriers) |
| 2365 | ret = submit_bh(WRITE_FLUSH_FUA, bh); |
| 2366 | else |
Chris Mason | ffbd517 | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 2367 | ret = submit_bh(WRITE_SYNC, bh); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2368 | |
Hisashi Hifumi | 4eedeb7 | 2009-06-10 15:28:55 -0400 | [diff] [blame] | 2369 | if (ret) |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2370 | errors++; |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2371 | } |
| 2372 | return errors < i ? 0 : -1; |
| 2373 | } |
| 2374 | |
| 2375 | int write_all_supers(struct btrfs_root *root, int max_mirrors) |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2376 | { |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2377 | struct list_head *head; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2378 | struct btrfs_device *dev; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2379 | struct btrfs_super_block *sb; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2380 | struct btrfs_dev_item *dev_item; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2381 | int ret; |
| 2382 | int do_barriers; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2383 | int max_errors; |
| 2384 | int total_errors = 0; |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2385 | u64 flags; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2386 | |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2387 | max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2388 | do_barriers = !btrfs_test_opt(root, NOBARRIER); |
| 2389 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2390 | sb = &root->fs_info->super_for_commit; |
| 2391 | dev_item = &sb->dev_item; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2392 | |
| 2393 | mutex_lock(&root->fs_info->fs_devices->device_list_mutex); |
| 2394 | head = &root->fs_info->fs_devices->devices; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 2395 | list_for_each_entry(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2396 | if (!dev->bdev) { |
| 2397 | total_errors++; |
| 2398 | continue; |
| 2399 | } |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2400 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2401 | continue; |
| 2402 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2403 | btrfs_set_stack_device_generation(dev_item, 0); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2404 | btrfs_set_stack_device_type(dev_item, dev->type); |
| 2405 | btrfs_set_stack_device_id(dev_item, dev->devid); |
| 2406 | btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes); |
| 2407 | btrfs_set_stack_device_bytes_used(dev_item, dev->bytes_used); |
| 2408 | btrfs_set_stack_device_io_align(dev_item, dev->io_align); |
| 2409 | btrfs_set_stack_device_io_width(dev_item, dev->io_width); |
| 2410 | btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); |
| 2411 | memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2412 | memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2413 | |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2414 | flags = btrfs_super_flags(sb); |
| 2415 | btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2416 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2417 | ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2418 | if (ret) |
| 2419 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2420 | } |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2421 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2422 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 2423 | total_errors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2424 | BUG(); |
| 2425 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2426 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2427 | total_errors = 0; |
Qinghuang Feng | c6e3087 | 2009-01-21 10:59:08 -0500 | [diff] [blame] | 2428 | list_for_each_entry(dev, head, dev_list) { |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2429 | if (!dev->bdev) |
| 2430 | continue; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2431 | if (!dev->in_fs_metadata || !dev->writeable) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2432 | continue; |
| 2433 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2434 | ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors); |
| 2435 | if (ret) |
| 2436 | total_errors++; |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2437 | } |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 2438 | mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2439 | if (total_errors > max_errors) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2440 | printk(KERN_ERR "btrfs: %d errors while writing supers\n", |
| 2441 | total_errors); |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 2442 | BUG(); |
| 2443 | } |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 2444 | return 0; |
| 2445 | } |
| 2446 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2447 | int write_ctree_super(struct btrfs_trans_handle *trans, |
| 2448 | struct btrfs_root *root, int max_mirrors) |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2449 | { |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 2450 | int ret; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2451 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2452 | ret = write_all_supers(root, max_mirrors); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2453 | return ret; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 2454 | } |
| 2455 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 2456 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2457 | { |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2458 | spin_lock(&fs_info->fs_roots_radix_lock); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2459 | radix_tree_delete(&fs_info->fs_roots_radix, |
| 2460 | (unsigned long)root->root_key.objectid); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2461 | spin_unlock(&fs_info->fs_roots_radix_lock); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2462 | |
| 2463 | if (btrfs_root_refs(&root->root_item) == 0) |
| 2464 | synchronize_srcu(&fs_info->subvol_srcu); |
| 2465 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2466 | free_fs_root(root); |
| 2467 | return 0; |
| 2468 | } |
| 2469 | |
| 2470 | static void free_fs_root(struct btrfs_root *root) |
| 2471 | { |
| 2472 | WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 2473 | if (root->anon_super.s_dev) { |
| 2474 | down_write(&root->anon_super.s_umount); |
| 2475 | kill_anon_super(&root->anon_super); |
| 2476 | } |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2477 | free_extent_buffer(root->node); |
| 2478 | free_extent_buffer(root->commit_root); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2479 | kfree(root->name); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2480 | kfree(root); |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2481 | } |
| 2482 | |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2483 | static int del_fs_roots(struct btrfs_fs_info *fs_info) |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2484 | { |
| 2485 | int ret; |
| 2486 | struct btrfs_root *gang[8]; |
| 2487 | int i; |
| 2488 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2489 | while (!list_empty(&fs_info->dead_roots)) { |
| 2490 | gang[0] = list_entry(fs_info->dead_roots.next, |
| 2491 | struct btrfs_root, root_list); |
| 2492 | list_del(&gang[0]->root_list); |
| 2493 | |
| 2494 | if (gang[0]->in_radix) { |
| 2495 | btrfs_free_fs_root(fs_info, gang[0]); |
| 2496 | } else { |
| 2497 | free_extent_buffer(gang[0]->node); |
| 2498 | free_extent_buffer(gang[0]->commit_root); |
| 2499 | kfree(gang[0]); |
| 2500 | } |
| 2501 | } |
| 2502 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2503 | while (1) { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2504 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2505 | (void **)gang, 0, |
| 2506 | ARRAY_SIZE(gang)); |
| 2507 | if (!ret) |
| 2508 | break; |
Chris Mason | 2619ba1 | 2007-04-10 16:58:11 -0400 | [diff] [blame] | 2509 | for (i = 0; i < ret; i++) |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 2510 | btrfs_free_fs_root(fs_info, gang[i]); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2511 | } |
| 2512 | return 0; |
| 2513 | } |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 2514 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2515 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) |
| 2516 | { |
| 2517 | u64 root_objectid = 0; |
| 2518 | struct btrfs_root *gang[8]; |
| 2519 | int i; |
| 2520 | int ret; |
| 2521 | |
| 2522 | while (1) { |
| 2523 | ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, |
| 2524 | (void **)gang, root_objectid, |
| 2525 | ARRAY_SIZE(gang)); |
| 2526 | if (!ret) |
| 2527 | break; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2528 | |
| 2529 | root_objectid = gang[ret - 1]->root_key.objectid + 1; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2530 | for (i = 0; i < ret; i++) { |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2531 | int err; |
| 2532 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2533 | root_objectid = gang[i]->root_key.objectid; |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2534 | err = btrfs_orphan_cleanup(gang[i]); |
| 2535 | if (err) |
| 2536 | return err; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2537 | } |
| 2538 | root_objectid++; |
| 2539 | } |
| 2540 | return 0; |
| 2541 | } |
| 2542 | |
| 2543 | int btrfs_commit_super(struct btrfs_root *root) |
| 2544 | { |
| 2545 | struct btrfs_trans_handle *trans; |
| 2546 | int ret; |
| 2547 | |
| 2548 | mutex_lock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2549 | btrfs_run_delayed_iputs(root); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2550 | btrfs_clean_old_snapshots(root); |
| 2551 | mutex_unlock(&root->fs_info->cleaner_mutex); |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2552 | |
| 2553 | /* wait until ongoing cleanup work done */ |
| 2554 | down_write(&root->fs_info->cleanup_work_sem); |
| 2555 | up_write(&root->fs_info->cleanup_work_sem); |
| 2556 | |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2557 | trans = btrfs_join_transaction(root, 1); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 2558 | if (IS_ERR(trans)) |
| 2559 | return PTR_ERR(trans); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2560 | ret = btrfs_commit_transaction(trans, root); |
| 2561 | BUG_ON(ret); |
| 2562 | /* run commit again to drop the original snapshot */ |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2563 | trans = btrfs_join_transaction(root, 1); |
Tsutomu Itoh | 3612b49 | 2011-01-25 02:51:38 +0000 | [diff] [blame] | 2564 | if (IS_ERR(trans)) |
| 2565 | return PTR_ERR(trans); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2566 | btrfs_commit_transaction(trans, root); |
| 2567 | ret = btrfs_write_and_wait_transaction(NULL, root); |
| 2568 | BUG_ON(ret); |
| 2569 | |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 2570 | ret = write_ctree_super(NULL, root, 0); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2571 | return ret; |
| 2572 | } |
| 2573 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2574 | int close_ctree(struct btrfs_root *root) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2575 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2576 | struct btrfs_fs_info *fs_info = root->fs_info; |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2577 | int ret; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2578 | |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 2579 | fs_info->closing = 1; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2580 | smp_mb(); |
| 2581 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2582 | btrfs_put_block_group_cache(fs_info); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2583 | |
| 2584 | /* |
| 2585 | * Here come 2 situations when btrfs is broken to flip readonly: |
| 2586 | * |
| 2587 | * 1. when btrfs flips readonly somewhere else before |
| 2588 | * btrfs_commit_super, sb->s_flags has MS_RDONLY flag, |
| 2589 | * and btrfs will skip to write sb directly to keep |
| 2590 | * ERROR state on disk. |
| 2591 | * |
| 2592 | * 2. when btrfs flips readonly just in btrfs_commit_super, |
| 2593 | * and in such case, btrfs cannnot write sb via btrfs_commit_super, |
| 2594 | * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag, |
| 2595 | * btrfs will cleanup all FS resources first and write sb then. |
| 2596 | */ |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2597 | if (!(fs_info->sb->s_flags & MS_RDONLY)) { |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2598 | ret = btrfs_commit_super(root); |
| 2599 | if (ret) |
| 2600 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
| 2601 | } |
| 2602 | |
| 2603 | if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { |
| 2604 | ret = btrfs_error_commit_super(root); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2605 | if (ret) |
| 2606 | printk(KERN_ERR "btrfs: commit super ret %d\n", ret); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2607 | } |
Chris Mason | ed2ff2c | 2007-03-01 18:59:40 -0500 | [diff] [blame] | 2608 | |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2609 | kthread_stop(root->fs_info->transaction_kthread); |
| 2610 | kthread_stop(root->fs_info->cleaner_kthread); |
| 2611 | |
Yan Zheng | f25784b | 2009-07-28 08:41:57 -0400 | [diff] [blame] | 2612 | fs_info->closing = 2; |
| 2613 | smp_mb(); |
| 2614 | |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 2615 | if (fs_info->delalloc_bytes) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2616 | printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n", |
Joel Becker | 2138093 | 2009-04-21 12:38:29 -0700 | [diff] [blame] | 2617 | (unsigned long long)fs_info->delalloc_bytes); |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 2618 | } |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 2619 | if (fs_info->total_ref_cache_size) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2620 | printk(KERN_INFO "btrfs: at umount reference cache size %llu\n", |
| 2621 | (unsigned long long)fs_info->total_ref_cache_size); |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 2622 | } |
Yan | bcc63ab | 2008-07-30 16:29:20 -0400 | [diff] [blame] | 2623 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2624 | free_extent_buffer(fs_info->extent_root->node); |
| 2625 | free_extent_buffer(fs_info->extent_root->commit_root); |
| 2626 | free_extent_buffer(fs_info->tree_root->node); |
| 2627 | free_extent_buffer(fs_info->tree_root->commit_root); |
| 2628 | free_extent_buffer(root->fs_info->chunk_root->node); |
| 2629 | free_extent_buffer(root->fs_info->chunk_root->commit_root); |
| 2630 | free_extent_buffer(root->fs_info->dev_root->node); |
| 2631 | free_extent_buffer(root->fs_info->dev_root->commit_root); |
| 2632 | free_extent_buffer(root->fs_info->csum_root->node); |
| 2633 | free_extent_buffer(root->fs_info->csum_root->commit_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2634 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2635 | btrfs_free_block_groups(root->fs_info); |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2636 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2637 | del_fs_roots(fs_info); |
Chris Mason | d10c5f3 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 2638 | |
Yan Zheng | c146afa | 2008-11-12 14:34:12 -0500 | [diff] [blame] | 2639 | iput(fs_info->btree_inode); |
Chris Mason | 9ad6b7b | 2008-04-18 16:11:30 -0400 | [diff] [blame] | 2640 | |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 2641 | btrfs_stop_workers(&fs_info->generic_worker); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 2642 | btrfs_stop_workers(&fs_info->fixup_workers); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2643 | btrfs_stop_workers(&fs_info->delalloc_workers); |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 2644 | btrfs_stop_workers(&fs_info->workers); |
| 2645 | btrfs_stop_workers(&fs_info->endio_workers); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2646 | btrfs_stop_workers(&fs_info->endio_meta_workers); |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 2647 | btrfs_stop_workers(&fs_info->endio_meta_write_workers); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2648 | btrfs_stop_workers(&fs_info->endio_write_workers); |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 2649 | btrfs_stop_workers(&fs_info->endio_freespace_worker); |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 2650 | btrfs_stop_workers(&fs_info->submit_workers); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2651 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 2652 | btrfs_close_devices(fs_info->fs_devices); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2653 | btrfs_mapping_tree_free(&fs_info->mapping_tree); |
Chris Mason | b248a41 | 2008-04-14 09:48:18 -0400 | [diff] [blame] | 2654 | |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 2655 | bdi_destroy(&fs_info->bdi); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2656 | cleanup_srcu_struct(&fs_info->subvol_srcu); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2657 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2658 | kfree(fs_info->extent_root); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 2659 | kfree(fs_info->tree_root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2660 | kfree(fs_info->chunk_root); |
| 2661 | kfree(fs_info->dev_root); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2662 | kfree(fs_info->csum_root); |
Li Zefan | 83a4d54 | 2010-12-27 16:19:53 +0800 | [diff] [blame] | 2663 | kfree(fs_info); |
| 2664 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2665 | return 0; |
| 2666 | } |
| 2667 | |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2668 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2669 | { |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2670 | int ret; |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2671 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2672 | |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 2673 | ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf, |
| 2674 | NULL); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 2675 | if (!ret) |
| 2676 | return ret; |
| 2677 | |
| 2678 | ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf, |
| 2679 | parent_transid); |
| 2680 | return !ret; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2681 | } |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 2682 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2683 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf) |
| 2684 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2685 | struct inode *btree_inode = buf->first_page->mapping->host; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 2686 | return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2687 | buf); |
| 2688 | } |
| 2689 | |
| 2690 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf) |
| 2691 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2692 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2693 | u64 transid = btrfs_header_generation(buf); |
| 2694 | struct inode *btree_inode = root->fs_info->btree_inode; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2695 | int was_dirty; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2696 | |
Chris Mason | b9447ef | 2009-03-09 11:45:38 -0400 | [diff] [blame] | 2697 | btrfs_assert_tree_locked(buf); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2698 | if (transid != root->fs_info->generation) { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2699 | printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " |
| 2700 | "found %llu running %llu\n", |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2701 | (unsigned long long)buf->start, |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2702 | (unsigned long long)transid, |
| 2703 | (unsigned long long)root->fs_info->generation); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2704 | WARN_ON(1); |
| 2705 | } |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2706 | was_dirty = set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, |
| 2707 | buf); |
| 2708 | if (!was_dirty) { |
| 2709 | spin_lock(&root->fs_info->delalloc_lock); |
| 2710 | root->fs_info->dirty_metadata_bytes += buf->len; |
| 2711 | spin_unlock(&root->fs_info->delalloc_lock); |
| 2712 | } |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2713 | } |
| 2714 | |
Chris Mason | d3c2fdcf | 2007-09-17 10:58:06 -0400 | [diff] [blame] | 2715 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2716 | { |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 2717 | /* |
| 2718 | * looks as though older kernels can get into trouble with |
| 2719 | * this code, they end up stuck in balance_dirty_pages forever |
| 2720 | */ |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2721 | u64 num_dirty; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 2722 | unsigned long thresh = 32 * 1024 * 1024; |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2723 | |
Jens Axboe | 6933c02 | 2009-03-17 09:36:37 +0100 | [diff] [blame] | 2724 | if (current->flags & PF_MEMALLOC) |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2725 | return; |
| 2726 | |
Chris Mason | 585ad2c | 2009-05-18 10:41:58 -0400 | [diff] [blame] | 2727 | num_dirty = root->fs_info->dirty_metadata_bytes; |
| 2728 | |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2729 | if (num_dirty > thresh) { |
| 2730 | balance_dirty_pages_ratelimited_nr( |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 2731 | root->fs_info->btree_inode->i_mapping, 1); |
Chris Mason | d6bfde8 | 2008-04-30 13:59:35 -0400 | [diff] [blame] | 2732 | } |
Chris Mason | 188de64 | 2008-05-09 11:52:25 -0400 | [diff] [blame] | 2733 | return; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 2734 | } |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2735 | |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 2736 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2737 | { |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 2738 | struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 2739 | int ret; |
Chris Mason | ca7a79a | 2008-05-12 12:59:19 -0400 | [diff] [blame] | 2740 | ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2741 | if (ret == 0) |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2742 | set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 2743 | return ret; |
Chris Mason | 6b80053 | 2007-10-15 16:17:34 -0400 | [diff] [blame] | 2744 | } |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 2745 | |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2746 | int btree_lock_page_hook(struct page *page) |
| 2747 | { |
| 2748 | struct inode *inode = page->mapping->host; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2749 | struct btrfs_root *root = BTRFS_I(inode)->root; |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2750 | struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; |
| 2751 | struct extent_buffer *eb; |
| 2752 | unsigned long len; |
| 2753 | u64 bytenr = page_offset(page); |
| 2754 | |
| 2755 | if (page->private == EXTENT_PAGE_PRIVATE) |
| 2756 | goto out; |
| 2757 | |
| 2758 | len = page->private >> 2; |
| 2759 | eb = find_extent_buffer(io_tree, bytenr, len, GFP_NOFS); |
| 2760 | if (!eb) |
| 2761 | goto out; |
| 2762 | |
| 2763 | btrfs_tree_lock(eb); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2764 | btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 2765 | |
| 2766 | if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { |
| 2767 | spin_lock(&root->fs_info->delalloc_lock); |
| 2768 | if (root->fs_info->dirty_metadata_bytes >= eb->len) |
| 2769 | root->fs_info->dirty_metadata_bytes -= eb->len; |
| 2770 | else |
| 2771 | WARN_ON(1); |
| 2772 | spin_unlock(&root->fs_info->delalloc_lock); |
| 2773 | } |
| 2774 | |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 2775 | btrfs_tree_unlock(eb); |
| 2776 | free_extent_buffer(eb); |
| 2777 | out: |
| 2778 | lock_page(page); |
| 2779 | return 0; |
| 2780 | } |
| 2781 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2782 | static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info, |
| 2783 | int read_only) |
| 2784 | { |
| 2785 | if (read_only) |
| 2786 | return; |
| 2787 | |
| 2788 | if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) |
| 2789 | printk(KERN_WARNING "warning: mount fs with errors, " |
| 2790 | "running btrfsck is recommended\n"); |
| 2791 | } |
| 2792 | |
| 2793 | int btrfs_error_commit_super(struct btrfs_root *root) |
| 2794 | { |
| 2795 | int ret; |
| 2796 | |
| 2797 | mutex_lock(&root->fs_info->cleaner_mutex); |
| 2798 | btrfs_run_delayed_iputs(root); |
| 2799 | mutex_unlock(&root->fs_info->cleaner_mutex); |
| 2800 | |
| 2801 | down_write(&root->fs_info->cleanup_work_sem); |
| 2802 | up_write(&root->fs_info->cleanup_work_sem); |
| 2803 | |
| 2804 | /* cleanup FS via transaction */ |
| 2805 | btrfs_cleanup_transaction(root); |
| 2806 | |
| 2807 | ret = write_ctree_super(NULL, root, 0); |
| 2808 | |
| 2809 | return ret; |
| 2810 | } |
| 2811 | |
| 2812 | static int btrfs_destroy_ordered_operations(struct btrfs_root *root) |
| 2813 | { |
| 2814 | struct btrfs_inode *btrfs_inode; |
| 2815 | struct list_head splice; |
| 2816 | |
| 2817 | INIT_LIST_HEAD(&splice); |
| 2818 | |
| 2819 | mutex_lock(&root->fs_info->ordered_operations_mutex); |
| 2820 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 2821 | |
| 2822 | list_splice_init(&root->fs_info->ordered_operations, &splice); |
| 2823 | while (!list_empty(&splice)) { |
| 2824 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 2825 | ordered_operations); |
| 2826 | |
| 2827 | list_del_init(&btrfs_inode->ordered_operations); |
| 2828 | |
| 2829 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 2830 | } |
| 2831 | |
| 2832 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 2833 | mutex_unlock(&root->fs_info->ordered_operations_mutex); |
| 2834 | |
| 2835 | return 0; |
| 2836 | } |
| 2837 | |
| 2838 | static int btrfs_destroy_ordered_extents(struct btrfs_root *root) |
| 2839 | { |
| 2840 | struct list_head splice; |
| 2841 | struct btrfs_ordered_extent *ordered; |
| 2842 | struct inode *inode; |
| 2843 | |
| 2844 | INIT_LIST_HEAD(&splice); |
| 2845 | |
| 2846 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 2847 | |
| 2848 | list_splice_init(&root->fs_info->ordered_extents, &splice); |
| 2849 | while (!list_empty(&splice)) { |
| 2850 | ordered = list_entry(splice.next, struct btrfs_ordered_extent, |
| 2851 | root_extent_list); |
| 2852 | |
| 2853 | list_del_init(&ordered->root_extent_list); |
| 2854 | atomic_inc(&ordered->refs); |
| 2855 | |
| 2856 | /* the inode may be getting freed (in sys_unlink path). */ |
| 2857 | inode = igrab(ordered->inode); |
| 2858 | |
| 2859 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 2860 | if (inode) |
| 2861 | iput(inode); |
| 2862 | |
| 2863 | atomic_set(&ordered->refs, 1); |
| 2864 | btrfs_put_ordered_extent(ordered); |
| 2865 | |
| 2866 | spin_lock(&root->fs_info->ordered_extent_lock); |
| 2867 | } |
| 2868 | |
| 2869 | spin_unlock(&root->fs_info->ordered_extent_lock); |
| 2870 | |
| 2871 | return 0; |
| 2872 | } |
| 2873 | |
| 2874 | static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans, |
| 2875 | struct btrfs_root *root) |
| 2876 | { |
| 2877 | struct rb_node *node; |
| 2878 | struct btrfs_delayed_ref_root *delayed_refs; |
| 2879 | struct btrfs_delayed_ref_node *ref; |
| 2880 | int ret = 0; |
| 2881 | |
| 2882 | delayed_refs = &trans->delayed_refs; |
| 2883 | |
| 2884 | spin_lock(&delayed_refs->lock); |
| 2885 | if (delayed_refs->num_entries == 0) { |
| 2886 | printk(KERN_INFO "delayed_refs has NO entry\n"); |
| 2887 | return ret; |
| 2888 | } |
| 2889 | |
| 2890 | node = rb_first(&delayed_refs->root); |
| 2891 | while (node) { |
| 2892 | ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node); |
| 2893 | node = rb_next(node); |
| 2894 | |
| 2895 | ref->in_tree = 0; |
| 2896 | rb_erase(&ref->rb_node, &delayed_refs->root); |
| 2897 | delayed_refs->num_entries--; |
| 2898 | |
| 2899 | atomic_set(&ref->refs, 1); |
| 2900 | if (btrfs_delayed_ref_is_head(ref)) { |
| 2901 | struct btrfs_delayed_ref_head *head; |
| 2902 | |
| 2903 | head = btrfs_delayed_node_to_head(ref); |
| 2904 | mutex_lock(&head->mutex); |
| 2905 | kfree(head->extent_op); |
| 2906 | delayed_refs->num_heads--; |
| 2907 | if (list_empty(&head->cluster)) |
| 2908 | delayed_refs->num_heads_ready--; |
| 2909 | list_del_init(&head->cluster); |
| 2910 | mutex_unlock(&head->mutex); |
| 2911 | } |
| 2912 | |
| 2913 | spin_unlock(&delayed_refs->lock); |
| 2914 | btrfs_put_delayed_ref(ref); |
| 2915 | |
| 2916 | cond_resched(); |
| 2917 | spin_lock(&delayed_refs->lock); |
| 2918 | } |
| 2919 | |
| 2920 | spin_unlock(&delayed_refs->lock); |
| 2921 | |
| 2922 | return ret; |
| 2923 | } |
| 2924 | |
| 2925 | static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t) |
| 2926 | { |
| 2927 | struct btrfs_pending_snapshot *snapshot; |
| 2928 | struct list_head splice; |
| 2929 | |
| 2930 | INIT_LIST_HEAD(&splice); |
| 2931 | |
| 2932 | list_splice_init(&t->pending_snapshots, &splice); |
| 2933 | |
| 2934 | while (!list_empty(&splice)) { |
| 2935 | snapshot = list_entry(splice.next, |
| 2936 | struct btrfs_pending_snapshot, |
| 2937 | list); |
| 2938 | |
| 2939 | list_del_init(&snapshot->list); |
| 2940 | |
| 2941 | kfree(snapshot); |
| 2942 | } |
| 2943 | |
| 2944 | return 0; |
| 2945 | } |
| 2946 | |
| 2947 | static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root) |
| 2948 | { |
| 2949 | struct btrfs_inode *btrfs_inode; |
| 2950 | struct list_head splice; |
| 2951 | |
| 2952 | INIT_LIST_HEAD(&splice); |
| 2953 | |
| 2954 | list_splice_init(&root->fs_info->delalloc_inodes, &splice); |
| 2955 | |
| 2956 | spin_lock(&root->fs_info->delalloc_lock); |
| 2957 | |
| 2958 | while (!list_empty(&splice)) { |
| 2959 | btrfs_inode = list_entry(splice.next, struct btrfs_inode, |
| 2960 | delalloc_inodes); |
| 2961 | |
| 2962 | list_del_init(&btrfs_inode->delalloc_inodes); |
| 2963 | |
| 2964 | btrfs_invalidate_inodes(btrfs_inode->root); |
| 2965 | } |
| 2966 | |
| 2967 | spin_unlock(&root->fs_info->delalloc_lock); |
| 2968 | |
| 2969 | return 0; |
| 2970 | } |
| 2971 | |
| 2972 | static int btrfs_destroy_marked_extents(struct btrfs_root *root, |
| 2973 | struct extent_io_tree *dirty_pages, |
| 2974 | int mark) |
| 2975 | { |
| 2976 | int ret; |
| 2977 | struct page *page; |
| 2978 | struct inode *btree_inode = root->fs_info->btree_inode; |
| 2979 | struct extent_buffer *eb; |
| 2980 | u64 start = 0; |
| 2981 | u64 end; |
| 2982 | u64 offset; |
| 2983 | unsigned long index; |
| 2984 | |
| 2985 | while (1) { |
| 2986 | ret = find_first_extent_bit(dirty_pages, start, &start, &end, |
| 2987 | mark); |
| 2988 | if (ret) |
| 2989 | break; |
| 2990 | |
| 2991 | clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS); |
| 2992 | while (start <= end) { |
| 2993 | index = start >> PAGE_CACHE_SHIFT; |
| 2994 | start = (u64)(index + 1) << PAGE_CACHE_SHIFT; |
| 2995 | page = find_get_page(btree_inode->i_mapping, index); |
| 2996 | if (!page) |
| 2997 | continue; |
| 2998 | offset = page_offset(page); |
| 2999 | |
| 3000 | spin_lock(&dirty_pages->buffer_lock); |
| 3001 | eb = radix_tree_lookup( |
| 3002 | &(&BTRFS_I(page->mapping->host)->io_tree)->buffer, |
| 3003 | offset >> PAGE_CACHE_SHIFT); |
| 3004 | spin_unlock(&dirty_pages->buffer_lock); |
| 3005 | if (eb) { |
| 3006 | ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY, |
| 3007 | &eb->bflags); |
| 3008 | atomic_set(&eb->refs, 1); |
| 3009 | } |
| 3010 | if (PageWriteback(page)) |
| 3011 | end_page_writeback(page); |
| 3012 | |
| 3013 | lock_page(page); |
| 3014 | if (PageDirty(page)) { |
| 3015 | clear_page_dirty_for_io(page); |
| 3016 | spin_lock_irq(&page->mapping->tree_lock); |
| 3017 | radix_tree_tag_clear(&page->mapping->page_tree, |
| 3018 | page_index(page), |
| 3019 | PAGECACHE_TAG_DIRTY); |
| 3020 | spin_unlock_irq(&page->mapping->tree_lock); |
| 3021 | } |
| 3022 | |
| 3023 | page->mapping->a_ops->invalidatepage(page, 0); |
| 3024 | unlock_page(page); |
| 3025 | } |
| 3026 | } |
| 3027 | |
| 3028 | return ret; |
| 3029 | } |
| 3030 | |
| 3031 | static int btrfs_destroy_pinned_extent(struct btrfs_root *root, |
| 3032 | struct extent_io_tree *pinned_extents) |
| 3033 | { |
| 3034 | struct extent_io_tree *unpin; |
| 3035 | u64 start; |
| 3036 | u64 end; |
| 3037 | int ret; |
| 3038 | |
| 3039 | unpin = pinned_extents; |
| 3040 | while (1) { |
| 3041 | ret = find_first_extent_bit(unpin, 0, &start, &end, |
| 3042 | EXTENT_DIRTY); |
| 3043 | if (ret) |
| 3044 | break; |
| 3045 | |
| 3046 | /* opt_discard */ |
| 3047 | ret = btrfs_error_discard_extent(root, start, end + 1 - start); |
| 3048 | |
| 3049 | clear_extent_dirty(unpin, start, end, GFP_NOFS); |
| 3050 | btrfs_error_unpin_extent_range(root, start, end); |
| 3051 | cond_resched(); |
| 3052 | } |
| 3053 | |
| 3054 | return 0; |
| 3055 | } |
| 3056 | |
| 3057 | static int btrfs_cleanup_transaction(struct btrfs_root *root) |
| 3058 | { |
| 3059 | struct btrfs_transaction *t; |
| 3060 | LIST_HEAD(list); |
| 3061 | |
| 3062 | WARN_ON(1); |
| 3063 | |
| 3064 | mutex_lock(&root->fs_info->trans_mutex); |
| 3065 | mutex_lock(&root->fs_info->transaction_kthread_mutex); |
| 3066 | |
| 3067 | list_splice_init(&root->fs_info->trans_list, &list); |
| 3068 | while (!list_empty(&list)) { |
| 3069 | t = list_entry(list.next, struct btrfs_transaction, list); |
| 3070 | if (!t) |
| 3071 | break; |
| 3072 | |
| 3073 | btrfs_destroy_ordered_operations(root); |
| 3074 | |
| 3075 | btrfs_destroy_ordered_extents(root); |
| 3076 | |
| 3077 | btrfs_destroy_delayed_refs(t, root); |
| 3078 | |
| 3079 | btrfs_block_rsv_release(root, |
| 3080 | &root->fs_info->trans_block_rsv, |
| 3081 | t->dirty_pages.dirty_bytes); |
| 3082 | |
| 3083 | /* FIXME: cleanup wait for commit */ |
| 3084 | t->in_commit = 1; |
| 3085 | t->blocked = 1; |
| 3086 | if (waitqueue_active(&root->fs_info->transaction_blocked_wait)) |
| 3087 | wake_up(&root->fs_info->transaction_blocked_wait); |
| 3088 | |
| 3089 | t->blocked = 0; |
| 3090 | if (waitqueue_active(&root->fs_info->transaction_wait)) |
| 3091 | wake_up(&root->fs_info->transaction_wait); |
| 3092 | mutex_unlock(&root->fs_info->trans_mutex); |
| 3093 | |
| 3094 | mutex_lock(&root->fs_info->trans_mutex); |
| 3095 | t->commit_done = 1; |
| 3096 | if (waitqueue_active(&t->commit_wait)) |
| 3097 | wake_up(&t->commit_wait); |
| 3098 | mutex_unlock(&root->fs_info->trans_mutex); |
| 3099 | |
| 3100 | mutex_lock(&root->fs_info->trans_mutex); |
| 3101 | |
| 3102 | btrfs_destroy_pending_snapshots(t); |
| 3103 | |
| 3104 | btrfs_destroy_delalloc_inodes(root); |
| 3105 | |
| 3106 | spin_lock(&root->fs_info->new_trans_lock); |
| 3107 | root->fs_info->running_transaction = NULL; |
| 3108 | spin_unlock(&root->fs_info->new_trans_lock); |
| 3109 | |
| 3110 | btrfs_destroy_marked_extents(root, &t->dirty_pages, |
| 3111 | EXTENT_DIRTY); |
| 3112 | |
| 3113 | btrfs_destroy_pinned_extent(root, |
| 3114 | root->fs_info->pinned_extents); |
| 3115 | |
| 3116 | t->use_count = 0; |
| 3117 | list_del_init(&t->list); |
| 3118 | memset(t, 0, sizeof(*t)); |
| 3119 | kmem_cache_free(btrfs_transaction_cachep, t); |
| 3120 | } |
| 3121 | |
| 3122 | mutex_unlock(&root->fs_info->transaction_kthread_mutex); |
| 3123 | mutex_unlock(&root->fs_info->trans_mutex); |
| 3124 | |
| 3125 | return 0; |
| 3126 | } |
| 3127 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 3128 | static struct extent_io_ops btree_extent_io_ops = { |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 3129 | .write_cache_pages_lock_hook = btree_lock_page_hook, |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 3130 | .readpage_end_io_hook = btree_readpage_end_io_hook, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 3131 | .submit_bio_hook = btree_submit_bio_hook, |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 3132 | /* note we're sharing with inode.c for the merge bio hook */ |
| 3133 | .merge_bio_hook = btrfs_merge_bio_hook, |
Chris Mason | 0da5468 | 2007-11-07 21:08:01 -0500 | [diff] [blame] | 3134 | }; |